File this form and all supporting documentation with the appraisal district office in each county in which the property is located generally between Jan. This video covers how to fill out Texas Residential Homestead Exemption with a focus on Bexar County.It's just five pages it's really pretty simple to fill it out it doesn't cost you anything you can only do it from January 1st through April 30th. How do I apply for a homestead exemption? Most counties have the homestead exemption form online. Applying for the homestead exemption is FREE and easy. An owner may only file one homestead exemption, and the application must be filed with the Appraisal District in the county the property is located in. To qualify for a homestead exemption in Texas, property owners must own and occupy their property as their principal residence on January 1st of the tax year. Texas offers an unlimited homestead exemption to all filers.