Tenn. Code Ann. § 67-7-206: When tax levied becomes delinquent - Interest and penalties

(a) The tax levied by this part shall become delinquent on the sixteenth day of the month next succeeding the month in which such tax accrues.

(b) All interest and penalties collected with respect to the tax imposed by this part shall be retained by the department to help defray the expenses of administration and collection.