1) Click the link to fill out a Fraud Referral Form online.
2) Send your complaint in writing to:
Criminal Investigation Division
Illinois Department of Revenue
PO Box 19014
Springfield Illinois 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 1 800 447-4278 or www.childsupportillinois.com.