Tenn. Code Ann. § 67-4-2706: Duty to keep and preserve records. [Effective on July 1, 2021.]

(a) It is the duty of every person required to pay a tax under this part to keep and preserve records showing the gross amount of tax owed to the state, and the amount of the person's gross charges taxable under this part, and other books of account that may be necessary to determine the amount of the tax under this part, and all those books and records shall be open to inspection at all reasonable hours to the commissioner or any person duly authorized by the commissioner.

(b) The books and records shall be maintained by the taxpayer for a period of three (3) years from December 31 of the year in which the taxpayer is responsible for paying the tax on the transaction or transactions represented by the record.