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 TNTAP: Filing a Business Tax Return I'm a CPA. Can I view my client's business license through TNTAP? How do I view estimated payments for franchise and excise tax in TNTAP?