Tarrant Mortgage Residential Financing. Just fill out the form below or give us a call at 800-688-7306 and get your property taxes paid today!Click Apply Now to start your loan application. As you complete the application, please use your best estimate if documentation is not available. FORMS. download and print forms. Complete the Payment Form and fax the payment form along with the filing to 512-475-2812. If you prefer to complete your form online, please choose from the available forms listed under the Adobe Fill and Sign heading.