You need your adjusted gross income from last year's taxes to file your federal income tax return online in 2026.

The agency still offers a Free File program that works with commercial tax software firms. Some companies also offer free tools for certain filers.

Reviewing your return for mistakes can help you avoid delays. Make sure the numbers you report match the W-2s and 1099s that you and the IRS receive. Get help from the IRS’s tools or the Volunteer ...

Carol M. Kopp edits features on a wide range of subjects for Investopedia, including investing, personal finance, retirement planning, taxes, business management, and career development. Khadija ...