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  1. Internal Revenue Service | An official website of the United States ...

  2. Payments - Internal Revenue Service

  3. Online account for individuals | Internal Revenue Service

  4. Forms & instructions - Internal Revenue Service

  5. Internal Revenue Service - Wikipedia

  6. Let us help you - Internal Revenue Service

  7. Tools | Internal Revenue Service

  8. Get an employer identification number | Internal Revenue Service

  9. Individual taxpayer identification number (ITIN) - Internal Revenue Service

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