How filing a tax return works
Filing a tax return means reporting last year's income, usually by mid-April in the US, and settling the gap between tax withheld from your pay and tax owed. Employers send a W-2 and other payers a 1099 by early February. If too much was withheld you get a refund; too little and you pay the difference.
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How to do it
- Collect every income form by early February: a W-2 from each employer and a 1099 for contract, bank interest or other income.
- Gather the other records the forms ask about, such as student loan interest, tuition statements and last year's return.
- Choose how to file: the federal tax agency's own free filing options, tax software, or a paid preparer.
- Enter the numbers exactly as they appear on each form, and double check your bank details for a refund.
- File by the deadline, usually mid-April, or file an extension, which extends the time to file but not the time to pay.
- Pay any amount owed by the deadline to avoid penalties and interest, or set up a payment plan with the agency.
- Keep a copy of the return and the forms for at least three years.
- Adjust your withholding on a new W-4 with your employer if you owed a lot or got a very large refund.
Stop and call a professional if
- You are self-employed, own a rental, sold property or investments, moved states, or earned income abroad: use a qualified tax preparer.
- You receive a letter from the tax agency: read it carefully and contact a qualified preparer or the agency through its official site.
- You owe back taxes or have not filed for years.
Common mistakes
- Filing before every income form has arrived.
- Ignoring a 1099 because the income was small.
- Thinking an extension also delays the payment.
- Answering calls or texts claiming to be the tax agency and demanding payment.
Quick self-check
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Teach this to someone
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Teach: How filing a tax return works
What to say
Filing a tax return means reporting last year's income, usually by mid-April in the US, and settling the gap between tax withheld from your pay and tax owed. Employers send a W-2 and other payers a 1099 by early February. If too much was withheld you get a refund; too little and you pay the difference.
What to show, in order
- Collect every income form by early February: a W-2 from each employer and a 1099 for contract, bank interest or other income.
- Gather the other records the forms ask about, such as student loan interest, tuition statements and last year's return.
- Choose how to file: the federal tax agency's own free filing options, tax software, or a paid preparer.
- Enter the numbers exactly as they appear on each form, and double check your bank details for a refund.
- File by the deadline, usually mid-April, or file an extension, which extends the time to file but not the time to pay.
- Pay any amount owed by the deadline to avoid penalties and interest, or set up a payment plan with the agency.
- Keep a copy of the return and the forms for at least three years.
- Adjust your withholding on a new W-4 with your employer if you owed a lot or got a very large refund.
When to stop and call a professional
- You are self-employed, own a rental, sold property or investments, moved states, or earned income abroad: use a qualified tax preparer.
- You receive a letter from the tax agency: read it carefully and contact a qualified preparer or the agency through its official site.
- You owe back taxes or have not filed for years.
The check question
Ask: What does a filing extension give you?
Related skills
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- Every skill in Money and Paperwork
Words on this page
Sources
- Federal tax agency's filing instructions for individuals, current tax year. Checked September 28, 2026.
Last reviewed . First published .