Indiana Code Title 31. Family Law and Juvenile Law § 31-13-2-2

Sec. 2. (a) Except as provided in subsection (b), a final determination made under section 1 of this chapter (or IC 31-7-8-3 before its repeal) is conclusive among the parties to the action and among persons who make claims under parties to the action.

(b) A defendant who was less than eighteen (18) years of age at the time the determination under section 1 of this chapter (or IC 31-7-8-3 before its repeal) became final may petition the circuit or superior court in which the original action was taken to review the determination.  This petition must be filed before the individual becomes nineteen (19) years of age.