A tax return is a form you file with the IRS that reports your income, deductions, and taxes paid during 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 paychecks or estimated payments. The IRS uses it to calculate whether you owe more tax, are due a refund, or have paid the right amount.

Most people file a tax return every year by April 15 (or the next business day if that falls on a weekend or holiday). If you earned income from a job, self-employment, investments, or other sources, you likely need to file. Even if you don't owe tax, filing can get you a refund of money withheld from your paychecks or a refundable tax credit like the Earned Income Tax Credit (EITC).

Key Takeaways

  • A tax return reports your income and calculates what you owe or what refund you should receive from the IRS.
  • The most common form is the 1040, which individuals use; the form you file depends on your income type and filing status.
  • You must file by April 15 each year if you earned income above a certain threshold, though filing earlier can speed up a refund.
  • Your employer sends you a W-2 form if you worked for them, and you use that information to complete your return.
  • Filing a return is how you claim refundable credits like the EITC, which can result in money back even if no tax was withheld.

The main form: IRS Form 1040

The Form 1040 is the standard individual income tax return. It has three pages and asks for your name, address, filing status (single, married filing jointly, head of household, etc.), and Social Security number or Individual Taxpayer Identification Number (ITIN).

On the 1040, you report income from all sources: wages from a job (using information from your W-2), self-employment income, interest, dividends, rental income, and other earnings. You then subtract deductions—either the standard deduction (a fixed amount that depends on your age and filing status) or itemized deductions (specific expenses like mortgage interest or charitable donations). The result is your taxable income, and the IRS calculates tax owed based on tax brackets for your filing status.

You also report tax already paid: federal income tax withheld from paychecks, estimated tax payments you made during the year, or tax credits you are may have access to to claim. The IRS subtracts what you paid from what you owe. If you paid more than you owe, you get a refund. If you paid less, you owe the difference.

Who must file and when

You must file a return if your income exceeds a threshold set by the IRS each year. The threshold depends on your age, filing status, and type of income. For 2023, a single person under 65 with only wage income must file if they earned more than $13,850. A married couple filing jointly must file if combined income exceeded $27,700. These amounts change each year, and they are higher if you are 65 or older.

Self-employed people have a lower threshold: you must file if your net self-employment income is $400 or more, regardless of other income. If you received a refundable tax credit in the past (like the EITC or Child Tax Credit), you may want to file even if you are below the threshold, because filing is how you claim that money back.

The deadline to file is April 15 of the year following the tax year. If April 15 falls on a weekend or federal holiday, the deadline moves to the next business day. You can request an extension to file by October 15, but the extension only delays filing—not payment. If you owe tax, interest and penalties begin accruing on April 15 even if you have not filed yet.

What documents you need to gather

Before you file, collect documents that show your income and tax payments. If you worked for an employer, you will receive a W-2 form by January 31 showing your wages and federal tax withheld. If you are self-employed, you track income and expenses yourself and report net profit on Schedule C (a form attached to the 1040).

If you earned interest or dividends, your bank or investment company sends a 1099-INT or 1099-DIV form. If you received unemployment benefits, you get a 1099-G. If you sold a home or other asset, you may receive a 1099-S. Gather all 1099 forms—the IRS receives copies, so your return must match.

You also need records of tax payments: pay stubs showing federal withholding, receipts for estimated tax payments, and documentation of any credits you plan to claim (like proof of childcare expenses for the Child and Dependent Care Credit, or mortgage interest statements for the mortgage interest deduction). Keep receipts and records for at least three years in case the IRS asks questions.

How filing changes your tax situation

Filing a return is the only way the IRS knows about your income and calculates what you owe or are owed. Without filing, the IRS only knows what your employer reported on your W-2—it does not know about deductions you are may have access to to, credits you can claim, or overpayment in your withholding.

If you are due a refund, filing gets that money back to you. Refunds are typically issued within 21 days of the IRS accepting your return if you file electronically and choose direct deposit. If you file by mail, it can take four to six weeks. If you owe tax and do not file, penalties and interest accumulate. The failure-to-file penalty is usually 5 percent of unpaid tax per month, up to 25 percent.

Filing also creates an official record with the IRS. This matters if you need to prove income for a loan, rental application, or government benefit. The IRS can issue a tax return transcript showing your reported income and tax paid, which many lenders and agencies accept as proof.

Filing options: paper, software, or help

You can file your return three ways: by mail, using tax software, or with help from a tax professional. Mailing a paper return takes longer (four to six weeks for processing) and increases the chance of errors. Most people file electronically using tax software like TurboTax, H&R Block, or TaxAct, which guides you through the form and checks for mistakes before submitting.

If your income is simple (only wages, no dependents, no itemized deductions), the IRS offers free software through the Free File program. You can also get free help from a tax professional through the Volunteer Income Tax Assistance (VITA) program, which operates at libraries, community centers, and nonprofits. VITA serves people earning under a certain income threshold (usually around $60,000) and can file your return at no cost.

If you hire a tax professional, they charge a fee (typically $150 to $500 depending on complexity) but handle the entire process and may find deductions or credits you missed. They also sign the return as a preparer, which means they take responsibility for accuracy.

What happens after you file

After you file electronically, the IRS usually accepts your return within 24 hours. You receive a confirmation number. The IRS then processes the return, which takes about 21 days if you are due a refund and file electronically with direct deposit. If you owe tax, you can pay online, by phone, or by mail by the April 15 deadline to avoid penalties.

If the IRS has questions about your return, they send a notice by mail asking for more information or documentation. This is called an audit or examination. Most audits are handled by mail; the IRS asks you to send receipts or other proof for specific items on your return. Keep your records for at least three years so you can respond if asked.

Once the IRS processes your return and issues a refund or accepts your payment, the tax year is closed. You can then file the next year's return starting January 1.

Frequently Asked Questions

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

If your income is below the filing threshold for your age and filing status, you are not required to file. However, if you had federal tax withheld from paychecks or you are may have access to to a refundable credit like the EITC, filing gets that money back to you. It costs nothing to file, so many people file anyway.

What is the difference between a W-2 and a 1099?

A W-2 is issued by your employer and reports wages you earned and tax withheld. A 1099 is issued by banks, investment companies, and other payers and reports income like interest, dividends, or self-employment earnings. Both must be reported on your tax return, and the IRS receives copies of both.

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

You can file once you have your W-2 from your employer, but you should wait until you have all 1099 forms and other income documents. If you file early and then receive a 1099 showing additional income, you will need to file an amended return (Form 1040-X). It is usually simpler to wait and file once.

What if I cannot pay the tax I owe?

File your return on time even if you cannot pay. The failure-to-file penalty is much larger than the failure-to-pay penalty. You can then set up a payment plan with the IRS, pay in installments, or request an offer in compromise if you cannot pay the full amount. Contact the IRS or a tax professional to discuss options.

How long do I need to keep my tax records?

Keep records for at least three years from the date you file. If you underreported income by 25 percent or more, keep records for six years. If you file a fraudulent return or do not file at all, there is no time limit. Keeping records longer than three years does not hurt and can be helpful if you need to prove income for a loan or other purpose.