Generally, the deadline to file an application for an exemption is April 30. To transfer your over 65 exemption, you must complete a new application for the newly inhabited property and indicate the address of the old.An eligible disabled person age 65 or older may receive both exemptions in the same year, but not from the same taxing units. NOTE: The Bexar County Appraisal District (BCAD) will automatically update existing homestead exemptions. You may verify your homestead status at BCAD. This video covers how to fill out Texas Residential Homestead Exemption with a focus on Bexar County. The Residential Homestead Exemption Form along with other forms used at the Bexar Appraisal District can be found on their website. The Bexar Appraisal District (BCAD) will automatically update accounts for residents who already have a homestead exemption. If the home is in San Antonio, that would be Bexar Appraisal District. You can send in the application via email, mail or fax.