Tex. Code Crim. Proc. art. 13.13
Criminal conspiracy may be prosecuted in the county where the conspiracy was entered into, in the county where the conspiracy was agreed to be executed, or in any county in which one or more of the conspirators does any act to effect an object of the conspiracy. If the object of the conspiracy is an offense classified as a felony under the Tax Code, regardless of whether the offense was committed, the conspiracy may be prosecuted in any county in which venue is proper under the Tax Code for the offense. If a conspiracy was entered into outside this State under circumstances that give this State jurisdiction to prosecute the offender, the offender may be prosecuted in the county where the conspiracy was agreed to be executed, in the county where any one of the conspirators was found, or in Travis County.
Tex. Code Crim. Proc. § 13.13