The court shall retain jurisdiction to enforce, modify, or terminate a permanent guardianship order until the child reaches eighteen (18) years of age, or nineteen (19) years of age for children adjudicated delinquent.
Tenn. Code Ann. § 37-1-805, under Permanent Guardianship.
Tenn. Code Ann. § 37-1-805
The court shall retain jurisdiction to enforce, modify, or terminate a permanent guardianship order until the child reaches eighteen (18) years of age, or nineteen (19) years of age for children adjudicated delinquent.