Texas Family Code - FAM § 103.002. Transfer of Original Proceedings Within State

(a) If venue of a suit is improper in the court in which an original suit is filed and no other court has continuing, exclusive jurisdiction of the suit, on the timely motion of a party other than the petitioner, the court shall transfer the proceeding to the county where venue is proper.

(b) On a showing that a suit for dissolution of the marriage of the child's parents has been filed in another court, a court in which a suit is pending shall transfer the proceedings to the court where the dissolution of the marriage is pending.

(c) The procedures in Chapter 155 apply to a transfer of: