The typical deadline for filing a Collin County homestead exemption application is between January 1 and April 30. Exemption applications can be downloaded from here.Fill out the other side of this application completely. Tarrant County homeowners can complete an online homestead exemption application or download the required form here. A property owner or the owner's authorized agent must file any necessary exemption form before May 1 of the tax year. Bought a primary residence within the past year in Texas? It's time to file for your Texas Homestead Exemption. Qualifying Collin County homeowners will benefit from a reduction in taxes from the new exemption rate. Dallas CAD and Collin CAD must approve all exemptions according to Texas Property Tax Code. Exemption forms are available through their websites.