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.Disabled applicants must complete form DTE 105E,. This video covers how to fill out Texas Residential Homestead Exemption with a focus on Bexar County. 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.