A tax return is a form you send to the IRS that reports your income, deductions, and tax payments for the year

A tax return is a document—usually filed electronically or by mail—that tells the IRS how much money you earned, what you spent on deductible expenses, and how much tax you already paid through withholding or estimated payments. The IRS uses your return to calculate whether you owe additional tax, are due a refund, or have paid the correct amount.

Most people file a return every year by April 15 (or the next business day if that falls on a weekend or holiday). You file because the law requires it if your income exceeds a certain threshold, or because you want to claim a refund of taxes already withheld from your paychecks. Even if you are not required to file, you may want to—for instance, to claim the Earned Income Tax Credit or to recover overpaid taxes.

Key Takeaways

  • A tax return reports your annual income, deductions, and tax payments to the IRS and determines whether you owe money or receive a refund.
  • You are required to file if your income exceeds a threshold that changes each year based on your age, filing status, and type of income.
  • The main forms are the 1040 (the basic return), the 1040-SR (for people 65 and older), and schedules that attach to the 1040 to report specific income or deductions.
  • You can file on paper, through tax software, or with help from a tax preparer, and the IRS offers free filing options if your income is below a certain level.

The main form: the 1040 and what goes on it

The 1040 is the standard individual income tax return form. It asks for your name, address, Social Security number, filing status (single, married filing jointly, head of household, and so on), and the names and Social Security numbers of any dependents you claim. It also has spaces for your total income, standard deduction or itemized deductions, and tax credits.

You report different types of income in different places on the 1040: wages from a job go in one line, interest and dividends in another, business income in another. If you have income that does not fit neatly into the main form—rental income, capital gains, self-employment income, or certain deductions—you attach additional forms called schedules to your 1040. For example, Schedule C is for self-employment income, Schedule D is for capital gains and losses, and Schedule A is for itemized deductions.

The 1040-SR is an alternative form for people 65 and older. It is laid out slightly differently to make it easier to read, but it serves the same purpose as the 1040.

Income, deductions, and credits: what reduces what you owe

Your tax return starts with your gross income—all the money you earned. From that, you subtract either the standard deduction (a flat amount set by the IRS each year) or itemized deductions (specific expenses you list out, like mortgage interest or charitable donations). The result is your taxable income, which is what the IRS actually taxes.

After calculating tax on your taxable income, you then subtract tax credits. A credit is different from a deduction: a deduction reduces your income, but a credit reduces your tax bill dollar-for-dollar. Common credits include the Child Tax Credit, the Earned Income Tax Credit, and education credits. If your credits exceed your tax bill, you may receive a refund.

Finally, you account for taxes you already paid during the year. If your employer withheld federal income tax from your paychecks, or if you made estimated tax payments, those amounts reduce what you owe. If you paid more than you owe, you get a refund. If you paid less, you owe the difference.

Who has to file and when

You must file a return if your income exceeds a threshold. That threshold depends on your age, filing status, and the type of income. For example, in 2024, a single person under 65 must file if their gross income is $14,600 or more; a married couple filing jointly must file if their combined income is $29,200 or more. These thresholds change each year. If you are self-employed, the threshold is lower—you must file if your net self-employment income is $400 or more, regardless of your other income.

Even if you do not have to file, you may want to. If taxes were withheld from your paychecks and your income is below the filing threshold, you will not get that money back unless you file a return. The same is true if you are due a refundable credit like the Earned Income Tax Credit.

The deadline to file is April 15 of the year following the tax year. For example, you file your 2024 return by April 15, 2025. You can request an extension, which gives you until October 15, but an extension to file is not an extension to pay—if you owe tax, interest and penalties begin accruing on April 15 regardless.

How to file: paper, software, or a preparer

You have three main options for filing. You can fill out the forms by hand and mail them to the IRS—this is slow and error-prone but costs nothing. You can use tax software (such as TurboTax, H&R Block, or TaxAct) to prepare your return on your computer and file it electronically—this is faster and the software catches many common mistakes. Or you can hire a tax preparer or CPA to prepare and file the return for you—this costs money but is useful if your situation is complicated.

The IRS also offers Free File, a program in which certain tax software companies offer free filing to people whose income is below a threshold (usually around $79,000). You can find the list of Free File partners on the IRS website. If you cannot afford a preparer and do not may have access to for Free File, some nonprofits and community centers offer free tax preparation through the Volunteer Income Tax Assistance (VITA) program.

Whichever method you choose, you will need documents like your W-2 (if you are an employee), 1099 forms (if you have other income), receipts for deductible expenses, and proof of any tax payments you made. Gather these before you start.

What happens after you file

Once you file, the IRS processes your return. If you filed electronically, processing usually takes two to three weeks. If you mailed a paper return, it takes longer—often six to eight weeks or more. You can check the status of your return using the IRS's "Where's My Refund?" tool on its website, which updates once a day.

If the IRS finds an error or has questions, it will send you a notice by mail. If everything is correct and you are due a refund, the IRS will send it to you by direct deposit (if you provided banking information) or by check. If you owe additional tax, the IRS will send you a bill with instructions on how to pay.

Keep a copy of your filed return and all supporting documents for at least three years. The IRS can audit a return up to three years after filing, and in some cases up to six or seven years. Having your records makes it much easier to respond if the IRS has questions.

Frequently Asked Questions

Do I have to file if I did not earn much money?

Not necessarily. If your income is below the threshold for your filing status and age, you are not required to file. However, if taxes were withheld from your paychecks or if you are due a refundable credit like the Earned Income Tax Credit, you should file to get that money back.

What is the difference between a refund and a credit?

A credit reduces your tax bill. A refundable credit can result in a refund if the credit is larger than your tax bill. A nonrefundable credit can only reduce your bill to zero; any excess is lost. A refund is money the IRS sends you because you overpaid your taxes during the year.

Can I file my return before I receive all my income documents?

You can file early if you have the documents you need, but you must report all income for the year. If you are waiting for a 1099 form from a client or employer, wait until you receive it before filing. If you file without reporting all income, you may face penalties and interest.

What if I cannot pay the tax I owe?

File your return on time anyway. You can then contact the IRS to set up a payment plan. The IRS offers short-term plans (120 days or less) at no cost and long-term installment agreements for a small fee. Paying late incurs interest and penalties, but filing late incurs larger penalties.

Do I need to file if I am retired and only receive Social Security?

Usually not, unless your combined income (including half your Social Security benefits) exceeds the threshold for your filing status. However, if you have other income—from a job, investments, or a pension—you may need to file. Use the IRS worksheet or consult a tax preparer to be sure.