Tex. Property Code § 94.254

In addition to other remedies provided by law, if a landlord retaliates against a tenant under this subchapter, the tenant may recover from the landlord a civil penalty of one month's rent plus $500, actual damages, court costs, and reasonable attorney's fees in an action for recovery of property damages, moving costs, actual expenses, civil penalties, or declaratory or injunctive relief, less any delinquent rents or other sums for which the tenant is liable to the landlord. If the tenant's rent payment to the landlord is subsidized in whole or in part by a governmental entity, the civil penalty granted under this section shall reflect the fair market rent of the leased premises plus $500.