Tex. Tax Code § 32.015

(a) On payment of the taxes, penalties, and interest for a year for which a valid tax lien has been recorded on the title records of the department, the collector for the taxing unit shall issue a tax certificate showing no taxes due or a tax paid receipt for such year to the person making payment. When the tax certificate showing no taxes due or tax paid receipt is filed with the department or when no suit to collect a personal property tax lien has been filed and the lien has been delinquent for more than four years, the tax lien is extinguished and canceled and shall be removed from the title records of the manufactured home. The collector for a taxing unit may not refuse to issue a tax paid receipt to the person who offers to pay the taxes, penalties, and interest for a particular year or years, even though taxes may also be due for another year or other years.

(b) In this section, "department" and "manufactured home" have the meanings assigned by Section 1201.003, Occupations Code; however, the term "manufactured home" does not include a manufactured home that has been attached to real property and for which the document of title has been canceled under Section 1201.217 of that code.