To apply for an exemption, call the Bexar Appraisal District at 210-224-2432. This video covers how to fill out Texas Residential Homestead Exemption with a focus on Bexar County.Bexar Appraisal District has an online portal where you can apply online. Applications for exemptions must be submitted to the Bexar Appraisal District. To get the basic homestead exemption, homeowners need to fill out this form and submit it to the county tax office. First, fill out the application specific to your County Appraisal District, then mail all of the documents to the Appraisal District for your County.