What number do I call if I have a question regarding Illinois Sales tax and login issues?

You can reach the Department of Sales and Use Taxes here:

  • Call us at: 1 800 732-8866 or 1 217 782-3336
  • Call TDD: 1 800 544-5304
  • Mail your ST-1 forms to: ILLINOIS DEPARTMENT OF REVENUE
    RETAILERS OCCUPATION TAX
    SPRINGFIELD IL 62796-0001
  • Mail your ST-1-X forms to: ILLINOIS DEPARTMENT OF REVENUE
    PO BOX 19034
    SPRINGFIELD IL 62794-9034

Website: https://mytax.illinois.gov/_/

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