How do I view a letter the Tennessee Department of Revenue sent me in TNTAP? Check out this video to view the steps of how to view letters from the Department in TNTAP. June 12, 2019 17:01 Related articles How do I renew my business licenses? My local clerk said I would have to renew through the Department of Revenue. TNTAP: Filing a Business Tax Return How do I create a TNTAP username and password? How do I pay the professional privilege tax online? What do the letters mean after my account number?