Chapter 6 — Taxes: How Income Tax Actually Works

🆘 WHAT TO DO RIGHT NOW

If you haven't filed in years: you are almost certainly not going to jail. The IRS wants money, not prosecutions, and it has payment plans. Start with the oldest unfiled year, file everything, then set up an installment agreement. See "If You Haven't Filed."

If you owe money you can't pay: file anyway, on time. The failure-to-file penalty is 5% per month; the failure-to-pay penalty is 0.5% per month. Filing without paying is ten times cheaper than not filing. Then request a payment plan online — approval is usually automatic.

If it's April 14 and you're not ready: file Form 4868 for an automatic six-month extension. It takes five minutes and is free. Note: an extension to file is not an extension to pay — estimate and pay what you can now.

If you got a letter from the IRS: most IRS letters are routine notices, not audits. Read it, find the notice number in the corner (e.g. CP2000), and look it up at irs.gov. Do not ignore it, and do not panic. There is a deadline on it; that deadline is the thing that matters.

If someone calls claiming to be the IRS and demanding immediate payment: it's a scam. The IRS initiates contact by mail. It does not call demanding gift cards, wire transfers, or crypto, and it does not threaten arrest over the phone.

Why taxes feel harder than they are

More people are afraid of taxes than of almost any other item in this book, and the fear is out of proportion to the difficulty in a way that's worth examining.

Part of it is genuine complexity — the tax code is enormous. But you don't interact with the tax code. You interact with a few pages of it, and for most people those pages describe something quite simple: you earned money, some was withheld, and now we're settling up.

Part of it is that the consequences feel unbounded. Everyone has heard that the IRS can ruin your life. In practice, the IRS is a large, slow, procedural bureaucracy that would overwhelmingly rather set up a payment plan than pursue you. Criminal tax prosecutions number in the low thousands a year, in a country with 160 million filers, and they overwhelmingly involve deliberate fraud, not confusion.

And part of it is deliberate. In several countries, the tax agency sends you a completed return that you check and approve — because it already has your wage and interest data, which is also true in the US. Attempts to build that here have been repeatedly opposed by companies that sell tax preparation software. Your confusion at tax time is, in a documented sense, a product.

So let's remove it.

The single most important concept: marginal rates

If you learn one thing from this chapter, this is it, because the misunderstanding of it costs real people real money every year.

A tax bracket applies only to the income inside that bracket. Not to all your income.

People believe that crossing into a higher bracket taxes everything at the higher rate. They therefore turn down overtime, decline raises, and refuse promotions. This is false. Earning more money never reduces your take-home pay because of income tax brackets.

Here's the mechanism. 2025 rates, single filer:

       INCOME                          RATE      TAX ON THIS SLICE
  ┌──────────────────────────┐
  │ $0 – $11,925             │  ───►   10%       $1,192.50
  ├──────────────────────────┤
  │ $11,925 – $48,475        │  ───►   12%       $4,386.00
  ├──────────────────────────┤
  │ $48,475 – $103,350       │  ───►   22%       ...
  ├──────────────────────────┤
  │ $103,350 – $197,300      │  ───►   24%
  ├──────────────────────────┤
  │ $197,300 – $250,525      │  ───►   32%
  ├──────────────────────────┤
  │ $250,525 – $626,350      │  ───►   35%
  ├──────────────────────────┤
  │ $626,350+                │  ───►   37%
  └──────────────────────────┘

Worked example: taxable income of $60,000.

First $11,925          × 10%  =  $1,192.50
Next  $36,550          × 12%  =  $4,386.00
Next  $11,525          × 22%  =  $2,535.50
                                ──────────
Total federal income tax      =  $8,114.00

MARGINAL rate:  22%   ← the rate on your NEXT dollar
EFFECTIVE rate: 13.5% ← what you actually paid overall ($8,114 ÷ $60,000)

Notice: this person is "in the 22% bracket" but pays 13.5% of their income. Those two numbers get conflated constantly.

Now the raise. Suppose they earn $5,000 more, pushing to $65,000. Only the new $5,000 is taxed at 22%:

Extra income:      $5,000
Extra tax:         $1,100  (22%)
Extra take-home:   $3,900

They are $3,900 richer. They were never at risk of being poorer. Take the raise. Take the overtime. Take the promotion.

⚠️ THE REAL THING PEOPLE ARE THINKING OF: benefit cliffs

There is a legitimate version of this fear, and it deserves to be stated accurately, because dismissing it entirely is its own kind of misinformation.

Income tax brackets are gradual. Some benefits are cliffs.

Medicaid, SNAP, childcare subsidies, housing assistance, and (before certain temporary expansions) ACA premium subsidies can have hard eligibility thresholds where one extra dollar of income eliminates a benefit worth thousands.

A parent earning $200 more a month and losing a childcare subsidy worth $600 a month is genuinely worse off. That is real, it is a serious design flaw in the safety net, and it is not the same thing as tax brackets.

If you receive means-tested benefits, check the specific income threshold before a large raise or additional hours. Your caseworker or benefits office can tell you. Many programs have phase-outs rather than cliffs, and some have transition protections — but you need to check yours specifically rather than guessing.

The shape of a tax return

Every return, no matter how complicated, follows this arc:

   GROSS INCOME
      (wages, interest, dividends, self-employment, unemployment,
       retirement distributions, capital gains…)
        │
        ├── minus  ADJUSTMENTS ("above-the-line" deductions)
        │          student loan interest, HSA contributions,
        │          traditional IRA, half of self-employment tax,
        │          educator expenses
        ▼
   ADJUSTED GROSS INCOME (AGI)
        │           ← the number that controls eligibility
        │             for a great many credits and deductions
        │
        ├── minus  STANDARD DEDUCTION  or  ITEMIZED DEDUCTIONS
        ▼           (whichever is larger — you choose)
   TAXABLE INCOME
        │
        ├── apply  TAX BRACKETS
        ▼
   TAX BEFORE CREDITS
        │
        ├── minus  TAX CREDITS  ← dollar-for-dollar reductions
        ▼
   TOTAL TAX
        │
        ├── minus  WITHHOLDING and ESTIMATED PAYMENTS ALREADY MADE
        ▼
   REFUND  or  AMOUNT OWED

That's the entire structure. Everything else is detail about what goes in each box.

The key insight from that diagram: your refund has nothing to do with how much tax you paid. It's the gap between your tax and your withholding. Two people with identical incomes and identical tax bills can have a $3,000 refund and a $500 bill, purely from W-4 settings.

The paperwork that shows up in January

Between late January and mid-February, forms arrive — in the mail, in an employer portal, in an email that looks like spam. Every one is a copy of something already sent to the IRS. That's the part people miss: the IRS has all of these before you do. Your return isn't a disclosure. It's a reconciliation.

Your W-2, box by box

This is Marisol Reyes's W-2 — a medical assistant in Dayton, Ohio, unmarried, two kids. We'll walk her whole return later.

╔══════════════════════════════════════════════════════════════════════════════╗
║  Form W-2  ·  Wage and Tax Statement  ·  Tax year 2025                       ║
║  Employer: RIVERBEND REGIONAL HEALTH        Employee: MARISOL REYES          ║
║  EIN: XX-XXXXXXX                            SSN: XXX-XX-4417                 ║
╠══════════════════════════════════════════════════════════════════════════════╣
║                                                                              ║
║  BOX  WHAT IT SAYS ON THE FORM                        AMOUNT                 ║
║  ──────────────────────────────────────────────────────────────────────      ║
║    1   Wages, tips, other compensation                34,000.00   ①          ║
║    2   Federal income tax withheld                       900.00   ②          ║
║    3   Social Security wages                          34,700.00   ③          ║
║    4   Social Security tax withheld                    2,151.40   ④          ║
║    5   Medicare wages and tips                        34,700.00              ║
║    6   Medicare tax withheld                             503.15   ⑤          ║
║  12a   Code D — 401(k) elective deferral                 700.00   ⑥          ║
║  12b   Code DD — cost of employer health coverage      6,240.00   ⑦          ║
║   13   Retirement plan   [X]                                      ⑧          ║
║  ──────────────────────────────────────────────────────────────────────      ║
║   15   State  /  Employer state ID    OH                                     ║
║   16   State wages                                    34,000.00              ║
║   17   State income tax withheld                       1,020.00   ⑨          ║
║   18   Local wages  —  DAYTON                         34,000.00              ║
║   19   Local income tax withheld                         850.00   ⑩          ║
║                                                                              ║
╚══════════════════════════════════════════════════════════════════════════════╝

① Box 1 — wages, tips, other compensation. Not your salary. Gross pay minus pre-tax deductions: Marisol's gross was $36,000, and her health premiums ($1,300) and 401(k) contributions ($700) came out before this box was calculated. Box 1 is the number that goes on your return — which is why people compare their offer letter to their W-2 and assume something broke.

② Box 2 — federal income tax withheld. Not your tax. An estimate your employer forwarded all year based on the W-4 you filled out on day one and never thought about again (Chapter 1).

③ Box 3 — Social Security wages, $34,700 — higher than Box 1, because the 401(k) contribution escapes income tax but not FICA. That gap equals your retirement contribution, which makes it a fast way to confirm the 401(k) was recorded. If the two boxes are identical and you thought you were contributing, ask payroll today.

④ Box 4 — Social Security tax, 6.2% of Box 3, up to an annual wage cap (about $176,100 in 2025). If you worked two jobs and your combined wages passed the cap, you overpaid and get it back as a credit — each employer withheld correctly, and the total was too much. Software catches this only if you enter both W-2s. ⑤ Box 6, Medicare, 1.45% has no cap.

⑥ Box 12 codes matter most and get read least: D is a traditional 401(k) deferral, AA Roth 401(k), W HSA contributions (which requires Form 8889). If a code appears here, something on your return depends on it.

⑦ Box 12, code DD — $6,240. The full annual cost of your health coverage, employer share included. This is not income and you are not taxed on it. People spot it and panic every year. Ignore it on your return — but remember it when comparing job offers (Chapter 22).

⑧ Box 13, "Retirement plan." If checked, your ability to deduct a traditional IRA contribution phases out at a much lower income (Chapter 7).

⑨ and ⑩ — state and local tax withheld. Many people learn their city taxes income by seeing Box 19. Some cities require a separate local return even when tax was withheld correctly, and skipping it is a leading source of a confusing letter two years later.

The other forms name themselves once you know the pattern: 1099-NEC is contractor pay, 1099-K money a platform processed for you, 1099-INT/-DIV/-B bank interest and investment income, 1099-G unemployment, 1099-R a retirement withdrawal, 1098-E/-T student loan interest and tuition, 1095-A ACA marketplace coverage (which is required to file), and a Schedule K-1 partnership or trust income. Don't file until you have all of them — brokerages and K-1s are habitually late. And a missing form doesn't make income invisible: contractor work under $600 generates no 1099 and is fully taxable, as are cash tips. If you're not sure what's out there, pull your wage and income transcript at irs.gov.

Deductions vs. credits (credits are better)

This distinction is worth real money.

A deduction reduces your taxable income. Its value is the deduction times your marginal rate. A $1,000 deduction in the 22% bracket saves $220.

A credit reduces your tax directly. A $1,000 credit saves $1,000 — four and a half times as much.

Refundable vs. nonrefundable: - Nonrefundable credits can reduce your tax to zero but no further. - Refundable credits pay you even if your tax is zero. The Earned Income Tax Credit and part of the Child Tax Credit are refundable. This is why low-income people should file even when not required to — there is money waiting.

Why "refundable" is the most consequential word in this chapter

Picture two people, both with a $0 tax bill. Give them a $2,000 nonrefundable credit and both get nothing — no tax left to erase, so it evaporates. Give them a $2,000 refundable credit and both get $2,000 in their bank account.

The refundable credits — the EITC, the refundable portion of the Child Tax Credit, 40% of the American Opportunity credit — are how the tax system delivers actual cash to low- and moderate-income working people, and they are delivered only through a filed tax return. No automatic payment, no reminder letter, no caseworker who notices. Every year, billions go unclaimed by people who reasoned that earning too little to owe tax meant there was no point filing. The logic is sound. It's also backwards. Below the filing threshold is precisely where filing pays the most.

That last row is where people go wrong. An itemized deduction is worth nothing until your itemized total exceeds the standard deduction, and then only the excess counts. A $1,000 donation when you're $4,000 below the standard deduction saves exactly zero. Give because you want to, not because someone called it a write-off.

And AGI is the gatekeeper number in the whole code — it gates the Saver's Credit, IRA deductibility, education credits, ACA subsidies, and income-driven student loan payments (Chapter 5). An above-the-line adjustment doesn't only cut your tax; it can move you back under a threshold — and you can usually still make an IRA or HSA contribution for last year right up to the filing deadline.

Standard deduction vs. itemizing

Everyone gets to subtract either the standard deduction or their itemized deductions, whichever is larger.

2025 standard deduction:

A warning about these particular numbers. Standard deductions and the Child Tax Credit are normally adjusted once a year for inflation and are otherwise stable. In 2025 they weren't: legislation enacted in the middle of the year raised both retroactively, for a tax year that was already half over. Figures published early in 2025 — including in guides, articles, and withholding calculators — were correct when written and wrong by the time returns were filed.

This is the clearest example in the book of why every number here is dated. Check the current figures at irs.gov before you rely on one, and be especially suspicious of any tax article that doesn't say which year it's describing.

(These rise annually with inflation — check the current year.)

Itemizing means listing individual deductions instead: mortgage interest, state and local taxes (capped — the SALT cap has been a moving political target, so verify the current limit), charitable contributions, and medical expenses above 7.5% of AGI.

Roughly 90% of filers take the standard deduction, because since 2018 it has been large enough that itemizing rarely wins without a mortgage in a high-tax state.

Practical advice: tax software calculates both and picks the larger automatically. Don't agonize. And do not keep shoeboxes of receipts for deductions you won't be able to use — if your itemizable total isn't in the neighborhood of the standard deduction, the record-keeping is wasted effort.

One exception worth knowing: "bunching." If you're near the threshold, concentrating two years of charitable giving into one year can let you itemize one year and take the standard deduction the next.

Filing status

This is the first question and it matters more than people expect.

Head of household, in detail

The most-missed status in the code, worth over a thousand dollars a year to a lot of single parents, with genuinely non-obvious rules. Three tests, all of which must be true.

1. You were unmarried — or "considered unmarried" — on December 31.

The second half is what almost nobody knows. You can be legally married and still file as head of household if your spouse did not live in your home at any point during the last six months of the year, you paid more than half the cost of keeping up that home, and a qualifying child lived with you more than half the year. That matters enormously for people who separated but never divorced, including people who left an abusive household. You do not have to wait for a divorce decree to stop being financially tied to a joint return.

2. You paid more than half the cost of keeping up a home.

That means rent or mortgage interest, property taxes, insurance, utilities, repairs, and food eaten in the home — not clothing, education, medical care, vacations, or transportation. If you live with a parent or roommate, the question is whether you paid more than half of that specific list, and public assistance money you spent on the household counts as paid by you.

3. A qualifying person lived with you more than half the year.

Usually your child — and a child away at school still counts. Also a stepchild, foster child, or sibling you support, and a parent, who does not have to live with you at all. If you pay more than half the cost of keeping up your mother's home or her nursing home and she qualifies as your dependent, you may file as head of household. People supporting aging parents miss that constantly.

What it's worth, for someone earning $45,000 with one child, 2025 numbers:

                              SINGLE          HEAD OF HOUSEHOLD
   Wages                     $45,000                 $45,000
   Standard deduction        -15,750                 -23,625
                            ─────────               ─────────
   Taxable income            $29,250                 $21,375

   Tax in the 10% band      $1,192.50              $1,700.00   ◄ wider band
   Tax in the 12% band       2,079.00                 525.00
                            ─────────               ─────────
   FEDERAL INCOME TAX       $3,271.50              $2,225.00

   DIFFERENCE:  $1,046.50  —  for checking a different box.

And that's before credits, several of which have friendlier phase-out ranges for head of household than for single.

One rule trips people up: only one person can claim head of household for the same qualifying child in a year. If you're separated and sharing custody, the child generally counts for the parent they lived with more nights — and the parent claiming the dependent for the Child Tax Credit can be the other one, via Form 8332. If that's contested, it's worth a free consultation at a Low Income Taxpayer Clinic rather than a guess.

Married — and whether to file jointly

Joint filing is usually better and often much better: separate filers lose the EITC entirely, lose most education credits and the student loan interest deduction, and lose the Child and Dependent Care Credit. But "usually" is not "always." Run it both ways — every tax program does this in ninety seconds — if you're on an income-driven student loan repayment plan (some base your payment on your income alone when you file separately, and the extra tax can be far less than the extra loan payment, Chapter 5), if one spouse has large medical expenses, if you're separating, or if you don't fully trust what's on the return.

⚠️ THE TRAP: The joint return you didn't read

Sign a joint return and you are responsible for all of it. Not half. All of it. This is joint and several liability: the IRS can collect the entire balance from either spouse, years later, after a divorce, including for a part of the return you knew nothing about.

It lands hardest on people in financially controlling relationships, where one partner handles "the money stuff" and the other signs where they're told. It's also a known tactic — leaving a partner holding a tax debt they didn't create.

What protects you: read the return before you sign, or don't sign it. You're entitled to a complete copy, and a spouse who won't give you one has told you something.

If it already happened, innocent spouse relief is real. Form 8857 requests relief for a spouse who didn't know and had no reason to know about an understatement. Not automatic, not fast, but the Taxpayer Advocate Service (1-877-777-4778) and Low Income Taxpayer Clinics handle these cases free.

Credits worth knowing

These are the ones ordinary people most often qualify for and most often miss.

Earned Income Tax Credit (EITC). Refundable, worth up to $8,046 for a family with three or more children (2025) — $7,152 with two, $4,328 with one. Available to workers with low-to-moderate income; the amount depends on income and number of children. Workers without children can qualify too, at a much smaller amount, and this group misses it most. Roughly one in five eligible people don't claim it. If your income is modest, check this first.

Why the EITC goes unclaimed. That one-in-five figure is billions of dollars a year, and the reasons are boringly practical:

• They didn't file, because income was below the filing requirement. The credit arrives only through a return. There is no other door.
• Their situation changed. Eligibility moves year to year with income, marriage, and children, and people who checked once and never rechecked are the largest group.
• They have no children and don't know the childless version exists — much smaller, around $649 maximum in 2025, but real, and this group has the lowest claim rate of anyone. They also don't know there's an age band: the childless EITC generally requires you to be at least 25 and under 65. A 22-year-old warehouse worker earning $14,000 gets nothing; the same person at 25 does. (Workers with qualifying children have no age floor.)
• They're scared of the audit rate. EITC returns are examined more often than most, largely because those audits are cheap automated correspondence audits — a documented policy problem, not a judgment about the filers. It's no reason to skip money you're owed. It is a reason to keep proof your child lived with you: school records, medical records, daycare statements, a letter from a landlord or clergy member.

And the part almost nobody knows: you can claim it late. You generally have three years from the original due date to file and still collect. Check the oldest year first — one window closes every April.

Two disqualifiers: investment income above a threshold ($11,950 for 2025) rules you out however low your wages are, and everyone counted needs a Social Security number valid for employment — an ITIN doesn't work for the EITC, though other credits do.

Child Tax Credit. Up to $2,200 per qualifying child under 17, with up to $1,700 of that refundable (2025 figures — this credit has changed repeatedly and is politically volatile, so verify).

Child and Dependent Care Credit. For childcare that lets you work. Percentage of expenses up to a cap.

American Opportunity Tax Credit. Up to $2,500 per student for the first four years of undergraduate education, 40% refundable. One of the most valuable education benefits and frequently unclaimed by students filing their own returns.

Lifetime Learning Credit. Up to $2,000 per return, no year limit, covers graduate school and job-skill courses. Can't be combined with AOTC for the same student in the same year.

Saver's Credit. Up to $1,000 ($2,000 married) for retirement contributions by low- and moderate-income filers. Dramatically under-claimed. If you're contributing to a 401(k) or IRA and your income is modest, check this.

Premium Tax Credit. ACA marketplace subsidies. Reconciled on your return — if your actual income was higher than you estimated, you may owe some back, which is a common and unpleasant surprise. Update your income with the marketplace during the year if it changes.

Adjustments (above-the-line, available without itemizing): - Student loan interest, up to $2,500 - HSA contributions - Traditional IRA contributions (subject to income limits if you have a workplace plan) - Half of self-employment tax - Educator expenses, up to $300

One return, start to finish

Abstractions are hard to hold. So here is Marisol's return — the W-2 from earlier in this chapter — step by step, with the arithmetic done. The situation: Marisol Reyes, 29, medical assistant, two children aged 6 and 9 living with her, not married, renting, with $480 of student loan interest on a 1098-E. That's the whole set of facts.

Steps 1–3 — Income, adjustments, deduction

Wages from Box 1: $34,000. No interest, no dividends, no side income. The $480 of student loan interest is an above-the-line adjustment, so she gets it whether or not she itemizes. She's unmarried, paid more than half the cost of her apartment, and both kids lived with her all year — head of household, standard deduction $23,625 for 2025.

   Total income                       $34,000
   Student loan interest                 -480
                                     ─────────
   ADJUSTED GROSS INCOME (AGI)        $33,520
   Standard deduction (HoH)           -23,625
                                     ─────────
   TAXABLE INCOME                      $9,895

Had she clicked "single" in a hurry, her deduction would be $15,750, her taxable income $17,770, and everything below worse.

Step 4 — The tax

Head of household brackets, 2025: 10% on the first $17,000. Her whole taxable income sits inside the first bracket, so $9,895 × 10% = $989.50 of tax before credits.

Step 5 — Nonrefundable credits

Child Tax Credit: $2,200 × 2 children = $4,400 available, applied against her tax first, and it can only take her to zero.

   Tax before credits                 $989.50
   Child Tax Credit applied           -989.50
                                      ─────────
   TAX AFTER NONREFUNDABLE CREDITS         $0
   Child Tax Credit left over        $3,410.50  ◄ doesn't just vanish

Step 6 — Refundable credits

Here's where the return stops being about tax and starts being about money arriving.

Additional Child Tax Credit. The leftover $3,410.50 can be refunded, subject to two limits: a per-child refundable cap ($1,700 each in 2025, so $3,400 for two) and a formula limit of 15% of earned income above $2,500 ($4,725 here). The formula clears easily. The per-child cap doesn't — it lands $10.50 below her leftover, so she refunds $3,400 and the last $10.50 of the credit is simply lost.

That $10.50 is worth noticing precisely because it's so small. The refundable cap is the reason the Child Tax Credit is worth less to the lowest earners than the headline number suggests: the further your tax bill is below the full credit, the more of it falls off the end.

Earned Income Tax Credit. Head of household, two qualifying children, earned income $34,000. The EITC is a table lookup rather than a calculation — the credit rises with every dollar earned up to a plateau ($7,152 for two children in 2025), holds there, then phases down once income passes $23,350 — and at her numbers the 2025 tables give roughly $4,900.

Step 7 — Settle up

   Total tax                                        $0
   Payments and refundable credits:
      Federal income tax withheld (Box 2)         +900
      Additional Child Tax Credit               +3,400
      Earned Income Tax Credit                  +4,900
                                               ────────
   REFUND                                       $9,200

She paid $900 in federal income tax and received $9,200 back. Her net federal income tax was negative: the system paid her $8,300 for having worked and raised two children on $34,000.

Nothing in that return is exotic. No strategy, no accountant, no obscure deduction anyone had to hunt for. Two kids, one 1098-E, the correct filing status — ninety minutes of free software. And if she doesn't file, she gets none of it. Not the $8,300 in credits, not even the $900 she already paid in. It stays where it is, quietly and permanently, except for the three-year window in which she could still go back and claim it.

Click "single" instead of head of household and she loses about $890. Skip the EITC because she isn't sure she qualifies and she loses $4,900. Take a storefront refund advance and she loses $400–600 in fees. Don't file at all, because "I don't owe anything," and she loses all of it.

And it works at much smaller numbers. Devon Ellis, 26, part-time retail: $9,400 in wages, $290 withheld, no kids. He's below the filing requirement, so nobody makes him file. He files anyway and gets the $290 back plus about $649 of childless EITC — a $939 refund for twenty minutes at a VITA site. (At 24 he'd have gotten only the $290, because of the age band.) The filing threshold tells you when you're required to file. It has never once told you when it's worth it.

How to actually file

Free options — use one of these

Before anything else: check irs.gov in January. Which free filing programs exist, which states they cover, and which situations they handle changes from year to year — programs have been added, restricted, defunded, and politically fought over. The IRS has at times operated its own direct filing tool, and when one exists and covers you it's the best option going; whether that's true for your year is a question only irs.gov can answer. Any book asserting the current status of a specific government filing tool is telling you something that may already be false, this one included. The categories below have been stable for years. The brands have not.

IRS Free File. A long-running partnership with commercial software companies offering genuinely free federal filing below an income threshold (in the $80,000s in recent years). You must enter through irs.gov/freefile. Going to the company's own site and hunting for the free product routes you into a paid one. That isn't an accident; it's the business model.

VITA (Volunteer Income Tax Assistance). Free in-person preparation by IRS-certified volunteers, for people generally under about $67,000 in income, people with disabilities, and limited-English speakers. Find a site at irs.gov/vita or call 1-800-906-9887. This is an excellent, underused service — real humans who will sit with you.

TCE (Tax Counseling for the Elderly). Same idea, focused on 60+, run largely through AARP Tax-Aide.

MilTax. Free for military members and families, no income limit.

Free Fillable Forms. Electronic versions of the paper forms, no income limit, no hand-holding. Fine if you know what you're doing.

⚠️ THE TRAP: The "free" tax software funnel

Major tax software companies have been sanctioned by the FTC for advertising "free" filing and then routing users into paid products. The pattern: you enter your data, spend forty minutes, and are told at the end that your situation requires an upgrade — often for something as ordinary as student loan interest or unemployment income. By then you've invested the time and you pay.

Defenses: enter through irs.gov/freefile, not the company's site. Use an IRS-run filing tool if one covers you. Use VITA. And if you're being upsold at the end, you can walk away — your data is not held hostage, and you can re-enter it elsewhere in twenty minutes.

Related: refund anticipation loans and "refund transfer" products at storefront preparers charge substantial fees to give you money days earlier than direct deposit would, and to deduct their prep fee from your refund. E-filing with direct deposit takes about three weeks. Wait the three weeks.

⚠️ THE TRAP: The refund advance

Every January, storefront preparers advertise your refund today, often as a "0% APR, no fee" advance. The advance itself may genuinely cost nothing. That's not where the money is.

How it works. To get the advance you need a refund transfer — a temporary bank account the preparer opens so your refund lands there first, costing roughly $35–45. The preparation fee, commonly $150–400 and frequently not quoted until the return is finished, comes out of the same account, along with a state return fee, "document storage," "audit protection," and a charge to load the remainder onto a prepaid card. Someone expecting $3,000 gets $2,500 and never writes a check for the difference. Who profits: the preparer, on fees you never physically hand over — because a fee deducted from a refund is one almost nobody compares against anything.

The honest math. E-file with direct deposit and the IRS typically issues refunds in about 21 days. Refunds claiming the EITC or Additional Child Tax Credit are held by law until mid-February, so the earliest realistic deposit for those families is late February regardless of who prepares the return. You're paying several hundred dollars to move money forward two weeks.

If you genuinely need it now — the rent is due Friday, this isn't a preference — weigh that fee against a credit union small-dollar loan (Chapter 5), a paycheck advance from your employer, or a 211 call for emergency rent assistance. And file free anyway, so at least the preparation costs nothing.

Track your refund at irs.gov/refunds. Three things delay one predictably: the EITC/ACTC hold, which by law keeps those refunds until mid-February; identity verification, where a letter (5071C is common) stops the refund until you respond using the number printed on the letter; and refund offset, where it's seized for past-due federal or state tax, child support, or defaulted federal student loans. If the debt is your spouse's and not yours, Form 8379, Injured Spouse Allocation, recovers your share of a joint refund.

When to pay a professional

• Self-employment with meaningful income or a business entity
• Rental property
• Significant investment activity, stock compensation, or crypto
• Multi-state income
• A major life change with tax consequences (marriage, divorce, death, inheritance)
• An IRS notice you don't understand
• An audit — always

Who to hire: a CPA or an Enrolled Agent (EA — a federally licensed tax specialist, often cheaper than a CPA and equally qualified for tax work). Both can represent you before the IRS. Storefront seasonal preparers vary enormously in quality, and their preparers may have only weeks of training.

Verify anyone you hire has a PTIN (Preparer Tax Identification Number) — it's required by law. Check the IRS directory of credentialed preparers. Never sign a blank return, never let a preparer direct your refund to their account, and be suspicious of anyone promising a bigger refund than everyone else — that promise is usually delivered through fabricated deductions, and you are the one who signs the return and bears the liability.

⚠️ THE TRAP: The preparer who promises a bigger refund

Every filing season, operations open in strip malls, church parking lots, barber shops, and Facebook groups promising refunds larger than anyone else can get you. The promise is usually kept. It's kept by inventing things.

The pattern: a fabricated Schedule C showing a business you don't have, with a convenient loss. Dependents who aren't yours. Inflated charitable giving. The preparer takes a cut and moves on. Two years later the matching system notices, and the person who owes it back with penalties and interest is you, because you signed it.

Red flags: they won't sign the return (a paid preparer must by law sign it and enter their PTIN; one who leaves it blank or tells you to file as "self-prepared" is a ghost preparer, and that's the whole point). They charge a percentage of your refund instead of a flat fee. They quote a refund before seeing your documents. They ask you to sign a blank return "to save time." The refund routes to their account — never, not once.

How to verify someone, in five minutes: search the IRS Directory of Federal Tax Return Preparers at irs.gov for their name. Then ask directly — "What's your PTIN, and will you be signing my return?" A legitimate preparer answers without blinking; anyone irritated by the question has answered it. Before you sign, check two things: the refund amount, and the routing and account numbers in the direct-deposit section of the 1040. Then get a complete copy of the filed return.

If it already happened: report the preparer with Form 14157 and expect to amend. A Low Income Taxpayer Clinic helps with both for free.

Fixing a return you already filed

You filed, and then something surfaced: a 1099 you'd forgotten, a credit you learned about a year later, a filing status you got wrong. Ordinary, and the fix is routine.

Don't amend for arithmetic errors (the IRS recalculates and sends a notice) or for a W-2 or 1099 you left off that they already have (you'll get a CP2000 proposing the change). Do amend for the wrong filing status — especially single when you qualified for head of household — a credit or deduction you missed entirely, or a dependent added or removed.

How. Form 1040-X, one per tax year, filed separately. Recent years can generally be e-filed; older years go on paper, certified mail. Attach the corrected schedules and explain the change in plain English. Expect it to be slow.

The deadline is the part worth memorizing: you generally have three years from the original filing deadline, or two years from when you paid the tax, whichever is later. So at any point in the spring, three prior years are usually still open. If you ever filed without claiming the EITC, an education credit, or head of household status when you were eligible, that's potentially thousands still recoverable — but only inside the window. Every April, one more year closes quietly.

This is a genuinely good use of a VITA appointment: bring the last three years of returns and ask them to look for missed credits.

Self-employment taxes

Chapter 1 introduced the shock. Here's the full picture.

You pay both halves of FICA: 15.3% (12.4% Social Security up to the wage cap, 2.9% Medicare with no cap) — on top of income tax, with nothing withheld.

Two partial offsets: you deduct the employer-equivalent half of SE tax as an adjustment, and you may qualify for the Qualified Business Income (QBI) deduction of up to 20% of business income (subject to income limits and business-type restrictions — this provision's status has changed with legislation, so verify).

Quarterly estimated payments are due April 15, June 15, September 15, and January 15. Pay at irs.gov/payments (Direct Pay is free) or through EFTPS.

Safe harbor — pay this and you avoid underpayment penalties regardless of what you end up owing: - 100% of last year's total tax (110% if your AGI was over $150,000), or - 90% of this year's tax

The first is easier because you already know last year's number.

Business deductions you can take (with records): - Home office — the simplified method is $5/sq ft up to 300 sq ft, and requires regular and exclusive business use. A corner of the living room where the kids also do homework does not qualify. - Mileage at the standard rate (about 70 cents/mile in 2025 — it changes annually). Keep a contemporaneous log: date, miles, purpose. This is the most commonly audited deduction and the easiest to lose without records. - Equipment, software, supplies - Business portion of phone and internet - Professional development, licenses, dues - Health insurance premiums — self-employed people can deduct these as an adjustment - Half of business meals (50%) - Retirement contributions: a SEP-IRA or Solo 401(k) allows dramatically higher contributions than an ordinary IRA (Chapter 7)

Keep business and personal money separate. A dedicated business checking account is the single practice that makes self-employment taxes manageable. It turns bookkeeping from archaeology into arithmetic.

What a Schedule C actually is

The word "business" makes people freeze. But if you drove for a rideshare app, sold on Etsy, cut hair, freelanced, or got paid cash to help someone move, you have a business for tax purposes. A sole proprietorship is what you automatically are the moment someone pays you for work and you're not their employee — no registration, no LLC, no permission required.

Schedule C is one page and does one thing: gross receipts minus business expenses equals net profit, and that net profit then goes two places — to your 1040 for income tax, and to Schedule SE for the 15.3%.

Gross receipts means everything, not just the totals on 1099s you received. A net loss is usable — if your side business lost $2,000 and you also have a W-2 job, that generally reduces your other taxable income, though losses year after year with no realistic profit motive get reclassified as a hobby and the expenses stop being deductible. And you owe self-employment tax starting at $400 of net profit, low enough to create a filing requirement by itself.

The 25–30% rule. Every time a client pays you, move 25–30% into a separate savings account and stop thinking of it as yours. That one habit is the whole difference between self-employment being manageable and being an annual April crisis.

Quarterly estimates, worked

Rafael Ortiz left a warehouse job in January to do HVAC service work as a contractor. He expects about $52,000 in net profit this year. Last year, on a W-2, his total tax was $3,100. Two ways to stay out of penalty territory.

OPTION A — Safe harbor on last year   (easy, certain)

   Last year's total tax                              $3,100
   Pay 100% of it across four quarters, so             $775 each
   ► No underpayment penalty, whatever he ends up owing.
   ► But he WILL owe a large balance in April.


OPTION B — Estimate this year   (more work, no April shock)

   Self-employment tax  (15.3% × 92.35% of profit)     $7,347   ◄ owed

   Net business profit                                 52,000
   minus half of SE tax (an adjustment)                -3,674
   minus standard deduction, single                   -15,750
                                                     ─────────
   Taxable income before QBI                           32,576
   minus QBI deduction (20%, capped by that line)      -6,515
                                                     ─────────
   Taxable income                                      26,061
   Income tax on that                                  $2,889

   ESTIMATED TOTAL TAX   $2,889 + $7,347   =          $10,236
   Each quarterly payment   (÷ 4)                      $2,559

Most people should do Option A in year one and Option B afterward. Option A's certainty is worth a lot when you don't yet know what you'll earn — but it leaves Rafael roughly $7,200 due in April. Pay the safe harbor and set aside 25–30% of every check and you get both: no penalty, and the cash to settle up. The safe harbor is a penalty shield, not a discount.

Due dates are April 15, June 15, September 15, and January 15 of the following year — not evenly spaced quarters, which catches everybody once. Pay free at irs.gov/payments with IRS Direct Pay. Missing a quarter isn't catastrophic; catch up on the next payment rather than freezing.

Gig platforms and the 1099-K

If a platform pays you — rideshare, delivery, Etsy, eBay, Airbnb, a payment app used for business — you may get a 1099-K reporting the gross amount processed for you.

That form's reporting threshold has been changed, lowered, delayed, and changed again several times, moving between $20,000-and-200-transactions and figures as low as $600, with transition amounts announced and then revised mid-stream. Don't trust any number you read about this, here included. Look up the current-year threshold at irs.gov — and note the durable point no threshold change touches: the form controls whether you get paperwork. It has never controlled whether the income is taxable.

Two things surprise people. It reports gross, before the platform's cut, so that gross figure goes on Schedule C as receipts and the commissions come out as expenses; report only what hit your bank account and the matching system flags it. And selling your own stuff isn't income: an old couch sold for less than you paid is no profit and no tax, but if a 1099-K captured it, report it and back it out (software has a path for "personal items sold at a loss").

QBI, in plain terms

The Qualified Business Income deduction takes up to 20% of net business profit off your income, whether or not you itemize. $40,000 of freelance profit means up to $8,000 off before your brackets apply — about $960 at a 12% marginal rate, $1,760 at 22%. It's capped by taxable income, so at low incomes you get less than the full 20%, as happened to Rafael. It does not reduce self-employment tax. Only income tax. This provision has been legislated, scheduled to expire, and legislated again; confirm it applies for your tax year at irs.gov.

If you haven't filed

This is more common than people think, and it is fixable. The paralysis usually comes from imagining that the situation is worse than it is.

The facts:

1. There is no criminal penalty for failure to file in the ordinary case of "I was overwhelmed and didn't do it." Criminal tax charges require willful evasion, and are pursued in a few thousand cases a year out of 160 million filers.
2. If you were owed a refund, there's no penalty at all — penalties are calculated on tax owed. But you lose the refund entirely if you file more than three years late. Every year you wait, one year's refund expires permanently. That is the real cost of delay for most non-filers.
3. If the IRS filed for you — a "Substitute for Return" — it used no deductions or credits, so the assessed amount is inflated. Filing an actual return usually reduces it substantially.
4. The IRS generally requires the last six years to be considered compliant.

The steps:

1. Get your transcripts. irs.gov/transcripts or Form 4506-T. Wage and income transcripts show every W-2 and 1099 reported under your SSN for each year. This solves the "I don't have my records" problem, which is what stops most people.
2. Get the right year's forms. irs.gov has every prior-year form.
3. File the oldest first, working forward.
4. File on paper if required for older years, certified mail with return receipt.
5. Then handle the balance — see below.
6. Consider help. A VITA site, a Low Income Taxpayer Clinic (LITC — free representation, find one at taxpayeradvocate.irs.gov/litc), or an EA.

Penalties: - Failure to file: 5% of unpaid tax per month, up to 25%. - Failure to pay: 0.5% per month, up to 25%. - Interest on both.

This is why you always file even when you can't pay. Ten times the penalty for not filing.

First-time penalty abatement: if you've been compliant for the prior three years, you can request penalty removal by phone. Call and ask for "first-time abatement." It's frequently granted and takes one call.

Reasonable cause abatement: serious illness, a death in the family, a natural disaster, records destroyed. Request in writing with documentation.

What the recovery actually looks like

Six unfiled years feels like a mountain. Here is the shape of it, because the shape is what makes it survivable.

  WEEK 1  ────────────────────────────────────────────────────────
  ► IRS online account at irs.gov/account.                      ①
  ► WAGE AND INCOME transcripts for every unfiled year.         ②
  ► ACCOUNT transcript — shows whether the IRS already filed a
    Substitute for Return on your behalf.                       ③

  WEEK 2  ────────────────────────────────────────────────────────
  ► The correct year's Form 1040, from irs.gov.
  ► Book free help: VITA, or a Low Income Taxpayer Clinic.

  WEEKS 3–6  ─────────────────────────────────────────────────────
  ► File the OLDEST year first, then work forward.              ④
  ► Mail paper returns certified, return receipt requested.     ⑤

  AFTER  ─────────────────────────────────────────────────────────
  ► ONE installment agreement covering all years.
  ► Call and request first-time penalty abatement.              ⑥
  ► Fix your W-4 or estimates so it doesn't quietly restart.

① and ②. The online account dissolves most of the paralysis. People don't file because they believe the records are gone. They aren't — every employer and client already sent a copy to the IRS, and you can download all of it in one afternoon.

③ Substitute for Return. If the IRS filed for you, it used your income with no deductions, no credits, no dependents, and the single filing status — so the assessed balance is close to the maximum possible, and filing a real return usually cuts it substantially. If you're staring at an IRS balance that seems impossibly large for what you earned, this is very often why.

④ Oldest first, because the three-year refund window closes one year at a time. ⑤ Older years often can't be e-filed, and certified mail is not optional. ⑥ First-time abatement needs clean compliance for the three years before the year you're abating, so it won't cover a whole decade, but it's one phone call for a possible four-figure reduction: "I'd like to request first-time penalty abatement for tax year [year]."

And what you're actually risking. People picture handcuffs. The realistic worst case for someone who simply didn't file is a balance, penalties, and a payment plan — plus, if it sits long enough and you never respond, a levy on wages or a bank account. Levies come after multiple written notices, never without warning, and they stop once you're in an agreement or in Currently Not Collectible status. The dread has been doing more damage to you than the IRS has.

If you owe money

Payment options:

Short-term payment plan — up to 180 days, no setup fee, penalties and interest continue.

Long-term installment agreement — monthly payments up to 72 months. If you owe under $50,000, approval is essentially automatic and can be set up online in minutes at irs.gov/paymentplan. Setup fee $22–130 depending on method; waived or reduced for low income (Form 13844).

Offer in Compromise — settling for less than owed. Real, and rare. The IRS accepts a minority of offers and evaluates your full financial picture, so it's genuinely for people who cannot pay. Use the free pre-qualifier tool at irs.gov before spending anything.

⚠️ THE TRAP: "Pennies on the dollar" tax relief firms

The radio ads promising to settle your IRS debt for pennies on the dollar are advertising the Offer in Compromise — which you can apply for yourself, free.

These firms charge thousands up front, frequently for people who obviously don't qualify, and several of the largest have collapsed amid fraud actions leaving clients with no representation and no refund.

Free legitimate help: the Taxpayer Advocate Service (an independent office inside the IRS — 1-877-777-4778) for cases causing financial hardship, and Low Income Taxpayer Clinics for free representation.

Currently Not Collectible. If paying anything would prevent you from meeting basic living expenses, the IRS can pause collection. Interest still accrues, but levies and garnishment stop. Ask for it by name.

💸 WHEN YOU CAN'T AFFORD THE RIGHT OPTION

The right option is: file on time, pay in full, forget about it. If you have a balance and no money, here is the ladder, in order.

1. File anyway, by the deadline. This is the highest-value line in this box and it costs nothing.

Failure to file costs 5% of the balance per month. Failure to pay costs 0.5% per month. Filing a return you can't pay is roughly ten times cheaper than not filing: on a $4,000 balance, five months of not filing runs about $1,000 in penalties; five months of filing-but-not-paying runs about $100. Hiding is expensive. And if you can't get the return done, file Form 4868 for an automatic extension — five minutes, free, no reason required. It doesn't extend the time to pay, but it stops the big penalty while you get organized.

2. Pay something, even a little. Penalties and interest run on the unpaid balance, so $200 against a $2,000 bill genuinely reduces what accrues. No minimum, no penalty for partial payment.

3. Set up an installment agreement online at irs.gov/paymentplan. Under $50,000 you aren't really being evaluated — you're filling in a form, proposing a monthly amount and a term up to 72 months. Propose an amount you will actually pay every single month, not the one you wish you could. The setup fee is reduced or waived for low income — Form 13844 requests it, and at or below 250% of the federal poverty level with direct debit it can be waived entirely. Nobody will offer this. You have to ask.

4. If you cannot pay anything without going without food, rent, or medicine, ask for Currently Not Collectible status. Call the number on your notice and say it in these words: "I'd like to request Currently Not Collectible status. Paying anything right now would prevent me from meeting basic living expenses."

They'll walk you through a financial statement — Form 433-F. If your allowable living expenses meet or exceed your income, collection stops. No levies. No garnishment. No calls. Interest keeps running and the IRS reviews it periodically, so it's a pause rather than a cancellation. But it's a real, official designation that exists precisely for your situation, it's free to request, and asking is not an admission of anything.

5. Offer in Compromise — only if you actually qualify. Use the free Pre-Qualifier at irs.gov before spending a dollar or calling anyone; if it says you might, file Form 656 yourself and let a Low Income Taxpayer Clinic (taxpayeradvocate.irs.gov/litc) help you prepare it free.

And the thing nobody says out loud: owing the IRS is not a moral failing and it's not permanent. It's a debt with unusually reasonable terms — no collection agency, no calls at dinner, a published interest rate, a ten-year collection limit, and a bureaucracy that would rather set up an $80-a-month plan than fight you. Of all the debts in this book, it's one of the more humane ones to owe.

Audits

Real audit rates are far lower than public anxiety suggests — roughly 0.4% of individual returns in recent years, and lower still for ordinary wage earners.

Types: - Correspondence audit — a letter asking about one item. The vast majority of audits. Usually resolved by mailing documentation. - Office audit — you go to an IRS office. - Field audit — they come to you. Rare, and generally involves business returns.

Common triggers: large deductions relative to income, a home office claim, high business mileage, cash-heavy businesses, unreported income the IRS already has a matching form for (this is the most common — the CP2000 notice), claiming the EITC (audited at a higher rate than one might expect, which is its own policy controversy), and math errors.

If audited: 1. Read the letter. Note exactly what's being questioned — it's usually one specific item. 2. Note the deadline. 3. Gather documentation for that item only. 4. Respond in writing, by the deadline, certified mail. 5. Consider representation. A CPA, EA, or attorney can represent you. For anything beyond a simple correspondence audit, get one. 6. You have appeal rights, including the independent IRS Office of Appeals and, ultimately, Tax Court.

Keep records for three years after filing (the general statute of limitations for assessment), six years if you might have underreported income by more than 25%, and indefinitely for property basis records, retirement account basis, and anything related to a year you never filed.

🎓 GOING DEEPER: State and local taxes

Nine states have no wage income tax: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, Wyoming. (They raise revenue elsewhere — property and sales taxes are often higher.)

If you moved during the year, you'll likely file part-year returns in both states.

If you work in one state and live in another, you generally file a nonresident return where you work and a resident return where you live, with a credit to prevent double taxation. Some states have reciprocity agreements that simplify this — check.

Remote work created real complications. A few states apply "convenience of the employer" rules that tax remote workers as if they were in the office state. If you work remotely across state lines, this is worth ten minutes of research or a question to a preparer.

Local income taxes exist in parts of Ohio, Pennsylvania, Michigan, Maryland, Kentucky, Missouri, Indiana, and New York City. Some require separate filing. Missing a local return is a common source of surprise notices.

Three details cost people real money. Moving mid-year means two part-year returns, not one — and because withholding follows the payroll record rather than reality, you may have had the old state's tax withheld on new-state income, which you get back from one and owe to the other only if you file both. Some states also make it hard to leave, treating you as still domiciled if you keep a home, a license, and voter registration there. Reciprocity, where it exists, requires a certificate filed with your employer, and nobody at your job will mention it. And working remotely from a third state for a few months can create a filing obligation there by itself.

🎓 GOING DEEPER: Filing without a Social Security number, and mixed-status households

If you or someone in your household doesn't have a Social Security number, tax season carries a weight it doesn't carry for other people. What follows is the mechanics; what to do with them is your decision.

Where to get real advice at no cost: a Low Income Taxpayer Clinic (taxpayeradvocate.irs.gov/litc). Many are housed in law schools and legal aid organizations, they serve people regardless of immigration status, and they're bound by attorney-client confidentiality in a way a storefront preparer is not. That referral is the most useful thing in this section.

The ITIN

An ITIN (Individual Taxpayer Identification Number) is a nine-digit number the IRS issues to people who have a US tax filing obligation but aren't eligible for a Social Security number. It exists because the tax code applies based on income and residence, not immigration status.

Getting one: Form W-7, filed with a tax return, plus proof of identity and foreign status. You can mail original documents, but it takes months and mailing your only passport is a real risk. Better: a Certifying Acceptance Agent or an IRS Taxpayer Assistance Center, where documents are verified in person and handed straight back.

ITINs expire if unused on a return for three consecutive years. A return filed with an expired one still gets processed, but credits are denied until it's renewed — same Form W-7, much faster before filing season than during.

An ITIN is not work authorization and it is not immigration status. It does one job: it lets a return be filed and processed. It's also accepted by many banks and credit unions for opening an account (Chapter 3).

What an ITIN can and can't claim

This is where households lose real money simply by not knowing the rules.

The practical consequence in a mixed-status household: parents filing with ITINs whose children have SSNs can claim the Child Tax Credit — including the refundable portion — but not the EITC. That's frequently still thousands of dollars, and it goes unclaimed constantly because the family assumed nothing at all was available.

Several states run their own EITC, and some allow ITIN filers even though the federal credit doesn't. Which states changes with legislation. Check your state's revenue department, or ask at a VITA site — they get asked this constantly and they'll know.

If you're a US citizen or resident married to a nonresident spouse, run the options. Married filing separately works without an SSN for your spouse — you write "NRA" in the space for their number — but costs several credits. Electing to treat your nonresident spouse as a US resident gets you the joint standard deduction and wider brackets, at the cost of their worldwide income becoming subject to US tax; if they earn little abroad, that's often a clear win. And head of household may be available if you have a qualifying dependent and your nonresident spouse doesn't live with you.

Confidentiality, stated honestly

Federal law restricts the IRS from disclosing return information to other agencies except in specific circumstances, and that protection has historically been the basis on which millions of people file with ITINs. The scope of that protection, and the extent of data-sharing between federal agencies, have been the subject of policy changes and active litigation. It would be dishonest for a book to tell you the situation is settled. What's true regardless: filing creates a record of work history and tax compliance that has mattered in immigration proceedings, and not filing creates its own exposure. The person to ask is an immigration attorney or a Low Income Taxpayer Clinic — not a tax preparer, and not the internet.

⚠️ THE TRAP: The notario

In much of Latin America, a notario público is a licensed attorney. In the United States, a notary public is someone authorized to witness a signature — no legal training required. That overlap in words has been used to defraud immigrant communities for decades and is still being used right now.

People advertising as notarios, "immigration consultants," or "tax and immigration services" charge substantial fees, do the work wrong or not at all, and close up. The damage isn't only the money: a botched filing creates a paper record that causes problems years later. Instead: a Low Income Taxpayer Clinic or VITA site for taxes; an immigration attorney or a DOJ-accredited representative for immigration (Chapter 28).

Students and workers on visas

Resident and nonresident are tax concepts, not immigration ones. You can be undocumented and a tax resident, or hold a perfectly valid visa and be a nonresident.

F-1 and J-1 students are generally "exempt individuals" — their days don't count toward the substantial presence test — for a period of years, which usually makes them nonresident aliens filing Form 1040-NR. Two consequences that cost people money every year:

1. Consumer tax software does not handle Form 1040-NR. The mainstream products file a 1040 — wrong form, probably a standard deduction and credits you weren't entitled to, and an amendment later. Use software built for nonresidents; many universities provide it free through the international student office.

2. Nonresident students are generally exempt from Social Security and Medicare tax on authorized employment, and employers get this wrong constantly. If FICA was withheld in error, ask your employer to refund it; if they won't, file Form 843 with Form 8316. It's usually several hundred dollars, and it's yours.

Even with no US income, F and J visa holders are generally required to file Form 8843. And after roughly five calendar years, F-1 students typically become residents for tax purposes and file an ordinary 1040 — including the standard deduction. Nobody notifies you when that happens. Count your years.

🌍 OUTSIDE THE US

• UK: most employees never file — PAYE takes the right amount and HMRC sends a P800 if it got it wrong. Self Assessment covers the self-employed, landlords, and higher earners; you need a UTR, and the online deadline is 31 January after a tax year running 6 April to 5 April. Keep your P60 and P45; the tax-free Personal Allowance works like the US standard deduction.
• Canada: everyone files every year, and filing is how you receive the GST/HST credit, the Canada Child Benefit, and provincial benefits — so low-income filers especially must file even owing nothing. CRA My Account holds your slips and auto-fills most of it. Deadline 30 April (15 June if self-employed, but any balance is still due 30 April).
• Australia: the financial year runs 1 July to 30 June and you lodge by 31 October, later through a registered agent. myTax pre-fills most data; you need a TFN. The Medicare levy and the surcharge for higher earners without private hospital cover are what surprise people.
• Ireland: most PAYE employees don't file, but many should — Revenue myAccount claims medical expenses, rent credits, and tuition relief, back four years.
• Germany: the Steuererklärung is optional for many single-employer employees and usually produces a refund. ELSTER is the free official portal, and you generally have four years to file voluntarily.
• Netherlands and the Nordics: heavily pre-filled. In Sweden, Norway, and Denmark the return arrives completed and you confirm it, sometimes by text. This is what the US system could look like, and the reason it doesn't is in the opening section of this chapter.
• Japan: most employees are covered entirely by the employer's year-end adjustment and never file.
• India: you file an ITR annually, typically by 31 July, using Form 16 from your employer. You choose between the older regime (more deductions) and the newer one (lower rates, fewer) — run both.

Americans abroad: you still have to file. The US taxes citizens on worldwide income regardless of residence — one of only a couple of countries that do. The Foreign Earned Income Exclusion and Foreign Tax Credit usually eliminate double taxation, but the filing obligation remains, and FBAR (FinCEN Form 114) is required if your foreign accounts exceeded $10,000 in aggregate at any point in the year. FBAR penalties are severe and this catches people badly.

If you've been abroad for years and never filed: the IRS runs procedures for non-willful failure to file that waive penalties on the way back in. Don't just start filing current years and hope — talk to a cross-border professional or a Low Income Taxpayer Clinic first. Appendix D goes further.

Common mistakes

• Believing a raise can reduce take-home pay.
• Not filing because you can't pay — ten times the penalty.
• Not filing when income is low, and forfeiting refundable credits.
• Losing old refunds by filing more than three years late.
• Not claiming the EITC, Saver's Credit, or education credits.
• Filing separately when married without running it both ways.
• Missing head of household status as a single parent.
• Not setting aside money for self-employment tax.
• Skipping quarterly estimated payments.
• Paying a "tax relief" firm for a free process.
• Falling for the IRS impersonation phone scam.
• Not keeping a mileage log.
• Ignoring an IRS letter.
• Filing in early February, before the late 1099s and K-1s arrive, and then having to amend.
• Seeing Box 12 code DD and thinking your health coverage is taxable income.
• Forgetting a second W-2 and never recovering the Social Security tax you overpaid past the cap.
• Signing a joint return you didn't read, or letting a preparer file one they refused to sign.
• Not amending to claim credits you missed while the three-year window is still open.
• Filing a 1040 as an international student who should have filed a 1040-NR.
• Not asking for the low-income payment-plan fee waiver, or for Currently Not Collectible status.

Key numbers

Chapter recap

• Marginal rates apply only to income within each bracket. A raise always increases take-home.
• Benefit cliffs are the real version of that fear, and they're separate from tax brackets.
• Credits beat deductions dollar for dollar, and refundable credits pay you even at zero tax.
• Withholding is not tax. Your refund is just the gap between the two.
• Every form that arrives in January is a copy of something the IRS already has. Your return reconciles; it doesn't disclose. Box 1 of your W-2 is not your salary, and Box 12 code DD is not income.
• Free filing exists, and what exactly exists changes yearly — check irs.gov in January, not an article.
• Head of household is worth about a thousand dollars a year and is missed constantly, including by people legally married but separated.
• Marisol's return: two kids, $34,000, $900 withheld, a $9,200 refund. None of it arrives without filing.
• Self-employment means 15.3% plus income tax, nothing withheld, quarterly payments, 25–30% set aside. The 1099-K threshold keeps changing; the taxability of the income never does.
• Always file even if you can't pay — ten times the penalty for not filing. Unfiled years are fixable with transcripts and prior-year forms, and the worst realistic outcome is a payment plan.
• Payment plans are near-automatic under $50,000, Currently Not Collectible exists for people who genuinely can't pay, and tax relief firms charge for a free process.
• Free representation — VITA, Low Income Taxpayer Clinics, the Taxpayer Advocate Service — is real, and almost nobody uses it.

Exercises

Do this right now (20 minutes)

6.1 — Find your rates. From last year's return, find your total tax (Form 1040, line 24) and your AGI (line 11). Divide: that's your effective rate. Then find your marginal bracket. Notice how different they are.

6.2 — Confirm the raise math. Take your current income and add $5,000. Compute the extra tax at your marginal rate. Write down the extra take-home. Keep this where you'll see it next time you're offered overtime.

6.3 — Check filing status. Confirm you're using the best one available. Single parents: check head of household eligibility specifically.

6.4 — Look up one credit. Pick EITC, Saver's Credit, or an education credit and check whether you qualify. Use the IRS Interactive Tax Assistant.

6.5 — Read Box 1 and Box 3 of your W-2. The gap between them should equal your traditional 401(k) or 403(b) contributions. If they're identical and you believed you were contributing, email payroll today. Then write down this year's filing deadline — and if you're self-employed, the next quarterly payment date — and put both in your phone with a two-week warning.

This week (3 hours)

6.6 — Create an IRS online account. irs.gov/account — balance, payment history, notices, transcripts. Do it now, not during a crisis. Identity verification takes a while and you don't want to be doing it for the first time with a deadline on a letter in front of you.

6.7 — Download your transcripts. Wage and income transcripts for the last three years. Compare every W-2 and 1099 against what you actually reported. Anything on the transcript that isn't on your return is a future letter you've just found early.

6.8 — Check free filing eligibility. On irs.gov, find what free options exist this year: an IRS-run tool if one is operating, the Free File threshold, MilTax if you or a family member serve, and the nearest VITA or TCE site (1-800-906-9887). Save the link. Do not start from a search engine in April.

6.9 — Run the three-year amendment check. Pull your last three returns. For each: was my filing status right? Did I claim the EITC if eligible? Was there a 1098-T or 1098-E I ignored? Did I skip the Saver's Credit? Anything you find is recoverable with a 1040-X, but only while the window is open.

6.10 — If you have unfiled years: pull transcripts for every one today, download the correct year's Form 1040 for each, then schedule three hours next weekend and file the oldest one. Not all of them. The oldest one.

6.11 — Run the withholding estimator (from Chapter 1) if you haven't. Aim for a small refund or a small bill.

6.12 — Look up your state and your city. Does your state tax income? Does your city or school district, and does it require a separate return even when tax is withheld? If you cross a state line for work, also search "[work state] [home state] reciprocity" and ask payroll what they're withholding.

6.13 — If anyone in your household files with an ITIN: check its expiration status, look up whether your state has its own EITC that ITIN filers can claim, and save your nearest Low Income Taxpayer Clinic (taxpayeradvocate.irs.gov/litc) whether or not you need it today.

This month (4 hours)

6.14 — Build the tax folder. One folder per tax year: W-2s, 1099s, 1098s, charitable receipts, medical expenses, HSA forms, 1095-A if you're on a marketplace plan, and the prior year's return. Start next year's in January. If you claim a child, add proof-of-residency documents now — a school record, a medical record, a daycare statement — so if a letter ever asks, the answer is already filed.

6.15 — If self-employed: open a separate business checking account, set up a mileage log app, put the four quarterly dates in your calendar with a week's warning, and calculate your safe harbor from last year's total tax. If you have platform income, also download the annual summary from every platform and reconcile each gross against your bank deposits; the difference is your deductible fees.

6.16 — Estimate this year. Use last year's return plus known changes to project this year's tax, and compare it to your withholding so far. Adjust mid-year, when the fix is one form instead of a bill.

6.17 — Audit-proof your deductions. For each one, ask: do I have documentation? If not, get it or don't claim it — and put it in the folder rather than in your memory. While you're at it, look up what a CP2000 and a 5071C are; between them they cover a large share of everything the IRS will ever mail you.

6.18 — Write the "if I owe money" plan before you owe money. One page: I will file by the deadline regardless. I will go to irs.gov/paymentplan. I will propose $___ a month, which I can actually pay. If I can't pay anything, I will call and ask for Currently Not Collectible status. And if you use a paid preparer, find them in the IRS Directory of Federal Tax Return Preparers and write down their PTIN; if they can't produce one, find someone else before next January.

6.19 — Do one person a favor. Tell someone low-income and childless that the EITC exists. Tell a single parent about head of household. Tell an international student that consumer software files the wrong form. The people who need this chapter most are the least likely to be handed it.

Reflection

6.20 — What did you believe about taxes before this chapter that turned out to be wrong?

6.21 — Where does your tax anxiety actually come from? A specific bad experience, a family attitude, or just the general aura of the topic?

6.22 — Do you get a large refund? Is that deliberate forced saving, or accidental? If accidental, will you change it — and honestly, will you actually save the difference?

6.23 — Marisol's return had nothing clever in it and it moved $9,200. Is there a version of that in your situation — a credit, a status, an unfiled year — that you've avoided because it felt complicated rather than because it is? If you've been putting something off, write down what specifically you're afraid will happen, then check that fear against this chapter. The gap between the imagined consequence and the real one is where the paralysis lives.

📋 ADD TO YOUR OPERATING SYSTEM

Create Section 6: Taxes:

• Filing status and the state(s) you file in
• Last year's AGI, total tax, effective rate, marginal bracket
• Refund or amount owed last year
• How you file (which service, which account)
• Where prior returns are stored — keep the last seven years
• IRS online account: that you have one (credentials in a password manager)
• Credits you qualify for and claim
• If self-employed: business account, quarterly payment dates and amounts, safe harbor number
• Any payment plan: monthly amount, remaining balance, account number
• Any unfiled years and their status
• Tax preparer's name, PTIN, and contact if you use one
• Which free filing route you use, plus a note to re-check it each January because these programs change
• Whether your city taxes income and needs a separate return; any part-year or reciprocity situation
• Years still open to amend, with their closing dates and any credit you may have missed
• If anyone in the household files with an ITIN: renewal date and your nearest Low Income Taxpayer Clinic. If you're a student on a visa: which form you file, and when that changes
• Where the proof-of-residency documents for a claimed child are kept
• Free-help numbers: VITA 1-800-906-9887, Taxpayer Advocate Service 1-877-777-4778
• Annual January reminder: start the folder, re-check free filing options, run the withholding estimator

Security note, as always: no Social Security numbers, no full account numbers, and no passwords in this document. Reference where those live, not what they are.

Next: You've handled what you owe. Chapter 7 is about what you keep — how ordinary people actually build wealth, why it's much more boring than the internet suggests, and how to recognize everyone trying to sell you something else.