How to Complete a Residential Homestead Exemption Application. A newly updated and userfriendly property tax payment portal is now available to all taxpayers in Tarrant County!Apply for homestead exemptions? Call the Tarrant Appraisal District at 817-284-0024. You should classify. 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. Researched and up to date. Property Report Sample. Texas has several exemptions from local property tax for which taxpayers may be eligible.