Texas Tax Code - TAX § 26.14. Annexation of Property During Tax Year

(a) Except as provided by Subsection (b) of this section, a taxing unit may not impose a tax on property annexed by the unit after January 1.

(b) If a taxing unit annexes territory during a tax year that was located in another taxing unit of like kind on January 1, each unit shall impose taxes on property located within its boundaries on the date the appraisal review board approves the appraisal roll for the district.  The chief appraiser shall prepare and deliver an appraisal roll for each unit in accordance with the requirements of this subsection.

(c) For purposes of this section, “taxing units of like kind” are taxing units that are authorized by the laws by or pursuant to which they are created to perform essentially the same services.