A homeowners' exemption may also apply to a supplemental assessment. For more information, call (925) 313-7481.STATEMENTS. This claim may be used to file for the Homeowners' Exemption for the Assessment Roll and the Supplemental Assessment Roll. Bought a primary residence within the past year in Texas? It's time to file for your Texas Homestead Exemption. The homestead exemption is available in every county in Texas, providing relief from school and property taxes based on your location. The general deadline for filing an exemption application is before May 1. In this post, we'll provide insights into the review process, application requirements, and the reasons behind our annual reapplication requests. Download PDF BOE-266 REV. The best thing you can do is go to your local website so if you're in tarrant county like we are you're at tad.