The Bexar County Tax Office offers the option of paying your Property Taxes online with either a major credit card or an electronic check (eCheck). For other questions you may have, please contact the Office of the Tax Assessor-Collector at 210-335-2251 for personalized assistance.You can attach the signed authorization form below. Just fill out the form below or give us a call at 800-688-7306 and get your property taxes paid today! The forms listed below are PDF files. They include graphics, fillable form fields, scripts and functionality that work best with the free Adobe Reader. We will only issue a payoff good through the next Change Date. If the closing date is past the next Change Date an updated. We include your property tax in the escrow portion of your monthly mortgage payment. Home loans, including rules for a standard payoff statement form.