Apply for homestead exemptions? Call the Tarrant Appraisal District at 817-284-0024.Some lenders, such as Homestead Financial Mortgage, may require you to fill out form PTAX342 before closing. To apply, your organization should complete one of the following four applications, available from the chief county assessment officer (CCAO). Apply online or Download form. To obtain our free assistance regarding homestead exemptions, kindly reach out to us at 713 290 9700. 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. Even with the relief from the expanded homestead exemption, many Texas homeowners feel afraid of being taxed out of their property. Cook County has identified the real and potential effects of homestead exemptions as an issue in the administration of its property tax system.