A property tax exemption excludes all or part of a property's value from property taxation, ultimately resulting in lower property taxes. A property owner must apply for an exemption in most circumstances.How can I find out what my listed exemptions are? Contact your local Appraisal District. What residence homestead exemptions are available to persons age 65 or older or disabled? There are several types of exemptions you may receive. You must apply with your county appraisal district to get a homestead exemption. Applying is free and only needs to be filed once. I'm going to show you how to file your homestead exemption in Dallas County Texas. To apply for an exemption contact your respective appraisal district to ask for an application.