Tex. R. Civ. P. 788
As amended through August 27, 2024
The defendant in such action may file only the plea of "not guilty," which shall state in substance that he is not guilty of the injury complained of in the petition filed by the plaintiff against him, except that if he claims an allowance for improvements, he shall state the facts entitling him to the same.
Tex. R. Civ. P. 788