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

  2. Forms & instructions - Internal Revenue Service

  3. Online account for individuals | Internal Revenue Service

  4. IRS Local Office Locator | Internal Revenue Service

  5. Internal Revenue Service - Wikipedia

  6. Internal Revenue Service (IRS) - USAGov

  7. Contact the IRS for questions about your tax return - USAGov

  8. What Is the Internal Revenue Service (IRS)? - Investopedia

  9. Payments | Internal Revenue Service

  10. IRS Free File | Internal Revenue Service