Who Must File a Tax Return
Filing tax return requirements depend on your age, filing status, gross income, and the type of income you earned. The IRS generally requires a return when your income crosses a threshold that varies by age and filing status. For the 2024 tax year, a single filer under 65 must file if gross income was at least $13,850, while a married couple filing jointly needs to file if their combined income was $27,700 or more. Self-employed individuals must file if net earnings were $400 or higher, regardless of age.
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Even if you are below the filing threshold, you may still want to file. You could qualify for a refundable credit, such as the Earned Income Tax Credit or the Premium Tax Credit, only by submitting a return. Similarly, if federal income tax was withheld from your pay, a return is the only way to get that money back.
Documents You Need Before You Start
Gather the right paperwork early so you can meet filing requirements without delays. The core documents include a W-2 from each employer, a 1099-NEC for freelance or contract work, and a 1099-INT or 1099-DIV for bank interest and investment income. If you received unemployment, you will get a 1099-G. Health coverage information from Form 1095-A, 1095-B, or 1095-C is also important, because it affects your ability to claim the Premium Tax Credit and confirms you met the shared responsibility provision.
Keep records of any estimated tax payments you made during the year, including bank drafts or payment confirmations from the IRS Direct Pay system. If you plan to claim deductions for student loan interest, charitable contributions, or mortgage interest, the corresponding receipts and statements must be organized and available. While you do not always attach these to the form, having them ready supports the claims you make on the return.
Key Deadlines and Extensions
The standard deadline for most individual tax returns is April 15 of the year following the tax year. When that date falls on a weekend or holiday, the deadline shifts to the next business day. If you cannot file by the deadline, you can request an automatic six-month extension by submitting Form 4868 by the original due date. An extension gives you more time to file, but it does not extend the time to pay any tax you owe. Interest and potential penalties begin accruing on unpaid balances from the original deadline.
State deadlines sometimes differ from the federal date, and certain states have their own filing thresholds or credit rules. Check your state tax agency's guidance if you have income sourced in multiple states or if you moved during the year.
Common Filing Mistakes to Avoid
Missing or incorrect Social Security numbers on the return or on dependent claims is one of the most frequent reasons for rejection. Math errors, mismatched income figures between your return and the forms filed by employers or institutions, and unsigned returns also cause processing delays. Another frequent issue is selecting the wrong filing status, which can change your standard deduction and eligibility for credits.
Failing to report all sources of income, including side jobs, gig work, and cryptocurrency transactions, can trigger a notice from the IRS even if you are below the filing threshold for your age group. Sign and date the return, double-check the routing and account numbers for any direct deposit, and keep a copy of the filed return and supporting documents for at least three years.
Special Situations That Create Filing Obligations
Certain life events change your filing requirements. If you are a nonresident alien, a resident alien married to a nonresident alien, or a self-employed individual earning above the $400 threshold, the rules differ from the standard W-2 employee path. Dependents who earn more than the standard deduction amount for their filing status must also file their own return. Understanding your specific situation ensures you meet the correct requirements and avoid unnecessary penalties.