File this form and all supporting documentation with the appraisal district office in each county in which the property is located generally between Jan. This video will cover how to fill out the homestead exemption form.Download PDF BOE-266 REV. 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. Bought a primary residence within the past year in Texas? It's time to file for your Texas Homestead Exemption. Where can I get the proper form to file for the exemption? Efforts to make this property tax relief exemption possible took months to formulate in the legislature earlier this year. One place to search and find your next commercial real estate rental.