Tex. Est. Code § 202.101

If, after a proceeding to declare heirship is commenced, an administration of the estate of the decedent who is the subject of the proceeding is granted in this state or the decedent's will is admitted to probate in this state, the court in which the proceeding to declare heirship is pending shall, by an order entered of record in the proceeding, transfer the proceeding to the court in which the administration was granted or the will was probated.