The application filing period is from January 1st through December 31st. 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 covers how to fill out Texas Residential Homestead Exemption with a focus on Bexar County. Disabled applicants must complete form DTE 105E,. Bought a primary residence within the past year in Texas? It's time to file for your Texas Homestead Exemption. To qualify for the over65 property tax exemption, a property owner must be 65 or older, and reside in the home as their principal residence.