Tenn. Code Ann. § 47-18-612

An action under this part may be brought in any court of competent jurisdiction within one (1) year of the date of the occurrence of any violation or within six (6) months of the time the rental-purchase agreement, together with any renewals or extensions thereof, ceases to be in effect, whichever is greater. Notwithstanding the above, an action under this part may be maintained by way of recoupment or counterclaim in an action brought against the consumer by the lessor or its assignee.