In order to be timely, payment of taxes must be postmarked on or before January 31st. The Residential Homestead Exemption Form along with other forms used at the Bexar Appraisal District can be found on their website.This video covers how to fill out Texas Residential Homestead Exemption with a focus on Bexar County. Complete list of Texas Comptroller Property Tax Forms and Applications click here. Texas Comptroller Property Tax Publications click here. GENERAL INFORMATION: Property owners applying for a residence homestead exemption file this form and supporting documentation with the appraisal district in. Property tax exemptions. 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. You can only apply for a residential homestead exemption on property you owned January 1st of this year. Fill out the application completely.