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  1. File your tax return - Internal Revenue Service

  2. Business taxes - Internal Revenue Service

  3. About Form 1040, U.S. Individual Income Tax Return

  4. Check if you need to file a tax return | Internal Revenue Service

  5. Here’s who needs to file a tax return in 2024

  6. Forms & instructions | Internal Revenue Service

  7. Annual filing and forms - Internal Revenue Service

  8. About Form 945, Annual Return of Withheld Federal Income Tax

  9. About Form 1120, U.S. Corporation Income Tax Return

  10. Prepare to file in 2025: Get Ready for tax season with key updates ...