How do I report tax fraud to the state of Tennessee? Please review our Reporting Tax Fraud section on the website or call (800) FRAUDTX or (800) 372-8389. July 22, 2020 16:07 Related articles Can I remain anonymous if I call to report someone for tax fraud? Is there a reward for reporting tax fraud? If I report tax fraud, how long will it take for something to be done? Where do most tips of alleged tax fraud come from? If I provide you my contact information, can I get periodic updates about Tennessee tax fraud investigations?