Contact US Internal Revenue Service Businesses

Provided below are the phone number, support email address, hours of operation and more to help you contact US Internal Revenue Service Businesses. Feel free to add a comment regarding the service you received after contacting US Internal Revenue Service Businesses.

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Businesses

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Phone: 800-829-4933

  • How to reach a live person:
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  • Hours of Operation:
    • Monday – Friday, 7:00 a.m. – 10:00 p.m. your local time (Alaska & Hawaii follow Pacific Time)
  • Email:
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  • Customer service link:
  • Description:
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