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  1. Forms & instructions - Internal Revenue Service

  2. Tax forms and publications | Internal Revenue Service

  3. IRS tax forms - Tools | Internal Revenue Service

  4. Get federal tax return forms and file by mail - USAGov

  5. IRS Free File | Internal Revenue Service - IRS tax forms

  6. Here’s How To Fill Out IRS Form 1040 - Forbes

  7. IRS Free File | Internal Revenue Service - IRS tax forms

  8. What Is the 1040 Tax Form? How to Fill It Out - NerdWallet

  9. Tax Forms | IRS Tax Forms - Bankrate.com

  10. File federal taxes - USAGov