For other questions you may have, please contact the Office of the Tax Assessor-Collector at 210-335-2251 for personalized assistance. If you need to close a business location that you no longer operate or end your sales tax responsibility completely, please use the form below.The Texas Property Tax Code requires owners of business personal property (BPP) to annually render those assets used in a business. Use Form 4797 to report: The sale or exchange of property. The involuntary conversion of property and capital assets. A Certificate of Occupancy is required for all businesses in the city. Learn more about applying for a Certificate of Occupancy. View information about property taxes and exemptions.