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How do I report tax fraud or related violations?

Thank you for your interest in reporting tax crimes within the State of Illinois. Tax fraud, including related violations such as the sale and delivery of contraband cigarettes or electronic cigarettes, or misuse of licenses affects us all by providing an unfair advantage to tax cheaters and by creating other harmful effects. See Descriptions

There are three different ways you may report this suspected tax crime or related violations:

  1. Fill out the online form to Report Tax Fraud and Related Violations.
  2. Send your complaint in writing to:
    ILLINOIS DEPARTMENT OF REVENUE
    BUREAU OF CRIMINAL INVESTIGATIONS
    PO BOX 19014
    SPRINGFIELD IL 62794-9014
  3. Call 1-800-CHEAT-11 (1-800-243-2811). Note: If our agents are unavailable when you call, you may leave a message. If you leave a message and require a response, please leave your contact information including a phone number where we can reach you.

Please Note: Complaints regarding improper claiming of dependents, fraudulent activity by non-Illinois residents or other issues related to the federal income tax return should be reported to the Internal Revenue Service (IRS) at 1 800 829-1040 or www.irs.gov

For Child Support call 1 800 477-4278.

You can find more information on the Report Tax Fraud and Related Violations page.

You may access additional information by searching the entire Illinois Department of Revenue website.

If you have additional inquiries, you may submit them on the Questions, Comments, or Requests form.