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Indiana Department of Revenue

DOR > Business Tax > Report Tax Fraud  > Informational Referral - Tax Fraud Informational Referral - Tax Fraud

Special Investigation Unit
Please fill in the fields below as completely as possible. If you do not know an answer, please feel free to skip that line. Note that the more information you are able to provide, the more effective the department is in its investigation.

Note: Confidential and personal information such as Social Security numbers, dates of birth or bank account numbers should not be transmitted via the department’s online form, as privacy cannot be protected or ensured due to the unsecured web form transmission. To include such information in tips about tax fraud, please complete the Tax Fraud Referral Form and mail it to P.O. Box 1737, SIU, Indianapolis, IN 46206 or call us at (317) 232-2271.