Tex. Tax Code § 323.204
Current with legislation from the 2023 Regular and Special Sessions signed by the Governor as of November 21, 2023.
In each county that has adopted the taxes authorized by this chapter, the tax imposed by Section 323.104, by other applicable local taxes, and by Subchapter D, Chapter 151, are added together to form a single combined tax rate, except only the rate of the county tax is used in a situation described by Section 323.205(b).
Tex. Tax Code § 323.204