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  1. 1-800-829-1040
    • 根据 2 个来源
    Visit the IRS contact page to get help using online tools and resources. Or: For individual tax returns, call 1-800-829-1040, 7 AM - 7 PM Monday through Friday local time.
    Individual taxpayers can call the IRS phone line at 1-800-829-1040 from 7 a.m. to 7 p.m. local time Monday through Friday for telephone assistance.
  2. Income Tax: general enquiries - GOV.UK

  3. IRS Local Office Locator | Internal Revenue Service

  4. Let us help you | Internal Revenue Service

  5. Contact HMRC - GOV.UK

  6. Contact us - Taxpayer Advocate Service

    Find a local TAS office. If you need to open a case with TAS download the Form 911. If you have opened a case and need to speak with your advocate, contact your local TAS office using the phone number tool below.

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

  8. Internal Revenue Service (IRS) - USAGov

  9. Contact Us | Taxes - California Tax Service Center

  10. Telephone assistance contacts for business customers