Every major IRS form, explained simply

Form 1040

U.S. Individual Income Tax Return

Form 1040 is the main return almost every U.S. taxpayer files each year. It's where you report all your income, claim the standard or itemized deduction, apply credits, and figure whether you owe or get a refund.

Form W-4

Employee's Withholding Certificate

Form W-4 tells your employer how much federal income tax to withhold from your paycheck. Getting it right keeps you from a surprise bill — or an oversized refund — at tax time.

Form Schedule D

Capital Gains and Losses

Schedule D summarizes your capital gains and losses from selling investments and other assets, splitting them into short-term and long-term. It works together with Form 8949.

Form Schedule E

Supplemental Income and Loss

Schedule E reports income and expenses from rental real estate, royalties, partnerships, S corporations and trusts. It's where landlords and pass-through owners report their share of income.

Form Schedule B

Interest and Ordinary Dividends

Schedule B lists your interest and dividend income when the totals are high enough to require detail — generally over $1,500 of either.

Form 1040-ES

Estimated Tax for Individuals

Form 1040-ES is used to calculate and pay quarterly estimated taxes on income that isn't subject to withholding — freelance pay, business profit, investment and rental income.

Form 1040-X

Amended U.S. Individual Income Tax Return

Form 1040-X corrects a return you already filed — to fix income, add a missed deduction or credit, or change your filing status.

Form 4868

Application for Automatic Extension (Individuals)

Form 4868 gives individuals an automatic six-month extension to file their return — moving the deadline to mid-October. It does not extend the time to pay.

Form W-7

Application for IRS Individual Taxpayer Identification Number (ITIN)

Form W-7 applies for an ITIN — a taxpayer ID for people who must file U.S. taxes but aren't eligible for a Social Security number.

Form Schedule C

Profit or Loss From Business

Schedule C reports the income and expenses of a business you run as a sole proprietor or single-member LLC. The net profit flows to your 1040 and to Schedule SE for self-employment tax.

Form Schedule SE

Self-Employment Tax

Schedule SE calculates the Social Security and Medicare tax the self-employed owe on their net earnings — the 15.3% self-employment tax. Half of it is deductible on your 1040.

Form 8829

Expenses for Business Use of Your Home

Form 8829 calculates the home office deduction for a space used regularly and exclusively for business, based on actual home expenses. It works with Schedule C.

Form 7004

Extension for Business Income Tax Returns

Form 7004 requests an automatic extension of time to file many business returns — including the 1120, 1120-S and 1065. Like the individual extension, it doesn't extend time to pay.

Form 1120

U.S. Corporation Income Tax Return

Form 1120 is the income tax return C corporations file to report income, deductions and credits and to pay the flat 21% federal corporate tax.

Form 1120-S

U.S. Income Tax Return for an S Corporation

Form 1120-S is the informational return an S corporation files to report income and each shareholder's share. The S corp usually pays no income tax itself — owners pay on their personal returns.

Form 1065

U.S. Return of Partnership Income

Form 1065 is the informational return a partnership or multi-member LLC files to report business income and each partner's share. The partnership itself generally pays no income tax.

Form 2553

Election by a Small Business Corporation

Form 2553 is how a corporation or LLC elects to be taxed as an S corporation, so profits pass through to owners instead of facing corporate tax.

Form SS-4

Application for Employer Identification Number

Form SS-4 is the application for an Employer Identification Number (EIN) — the federal tax ID a business uses to hire employees, open bank accounts and file returns.

Form 4562

Depreciation and Amortization

Form 4562 reports depreciation, the Section 179 expense election and amortization for business assets — letting you deduct the cost of equipment, vehicles and property.

Form Schedule K-1

Partner's / Shareholder's Share of Income

Schedule K-1 reports each owner's share of income, deductions and credits from a partnership, S corporation or trust. Owners use it to report that share on their personal returns.

Form 941

Employer's Quarterly Federal Tax Return

Form 941 is how employers report the income tax, Social Security and Medicare they withheld from employees' paychecks each quarter, plus the employer's share of payroll taxes.

Form 940

Employer's Annual Federal Unemployment (FUTA) Tax Return

Form 940 reports federal unemployment (FUTA) tax, which funds unemployment benefits. It's filed annually and is paid entirely by the employer — not withheld from employees.

Form W-2

Wage and Tax Statement

Form W-2 reports the wages an employer paid an employee and the taxes withheld during the year. You use it to fill in the income and withholding on your Form 1040.

Form W-9

Request for Taxpayer Identification Number

Form W-9 collects a contractor's or vendor's name and taxpayer ID so the paying business can later issue a 1099. It's an internal form — it isn't sent to the IRS.

Form 1099-NEC

Nonemployee Compensation

Form 1099-NEC reports payments of $600 or more made to independent contractors and freelancers. If you receive one, the IRS got a copy too — so that income needs to appear on your return.

Form 1099-MISC

Miscellaneous Information

Form 1099-MISC reports miscellaneous payments like rent, royalties, prizes and other income that isn't wages or contractor pay (which now goes on the 1099-NEC).

Form 1099-K

Payment Card and Third-Party Network Transactions

Form 1099-K reports payments you received through cards and platforms like PayPal, Venmo (business) and online marketplaces. Reporting thresholds have been changing, so more sellers and gig workers now receive one.

Form 1099-INT

Interest Income

Form 1099-INT reports interest income of $10 or more paid to you during the year — typically from banks, credit unions and brokerages.

Form 1099-DIV

Dividends and Distributions

Form 1099-DIV reports dividends and capital gain distributions paid to you, usually from stocks and mutual funds held in a taxable account.