Contact your local property appraiser if you have questions about your exemption. File the signed application for exemption with the county property appraiser.After you have created your online account and gathered the required documents necessary to qualify for the exemption that you are applying for. You should complete all required forms and applica ons for the exemp on and file them with your county property appraiser. Visit the website of your county's appraisal district and look for exemption information. Apply for homestead exemptions? Call the Tarrant Appraisal District at 817-284-0024. You'll need to complete an application form, provide necessary documentation, and submit it to the appropriate authority. Overview of Tarrant County, TX Taxes. Tarrant County, Texas, whose county seat is Fort Worth, is one of the most populous counties in the country.