100 Percent Disabled Veterans Exemption (Tax Code Section 11.131(b)). Exemption or the donated residence homestead of a partially disabled veteran exemption may be filed up to five years after the deadline for filing has passed.To receive the 100 percent disabled veteran exemption, you may file for the exemption up to five years after the delinquency date for the taxes on the property. NOTE: The Bexar County Appraisal District (BCAD) will automatically update existing homestead exemptions. This video covers how to fill out Texas Residential Homestead Exemption with a focus on Bexar County. Exemptions reduce the market value of your property and this lowers your tax obligation. Homestead tax exemptions;.