Because this is a newly created exemption, you will need to submit an application with the Bexar Appraisal District. This video covers how to fill out Texas Residential Homestead Exemption with a focus on Bexar County.Applications for exemptions must be submitted to the Bexar Appraisal District. Bexar County residential homestead exemptions. Visit the Bexar Appraisal District website for exemption application forms. PART A: Change an Existing Exemption. Complete this portion to rescind or change the percent of the exemption currently in place.