You must file the application between January 1 and April 30. Attach a copy of the current vehicle registration receipt to the application.How can I find out what my listed exemptions are? Contact your local Appraisal District. The general deadline for filing an exemption application is before May 1. To apply for an exemption contact your respective appraisal district to ask for an application. I'm going to show you how to file your homestead exemption in Dallas County Texas. Certain exemptions may also require Form 50-114-A. The exemptions apply only to property that you own and occupy as your principal place of residence. Eldorado Pkwy, McKinney, TX 75069.