The typical deadline for filing a Collin County homestead exemption application is between January 1 and April 30. Fill out the form and mail it to your appraisal district with the required documentation.Or disabled, may be filed up to two years after the deadline for filing has passed. (Tax Code Section 11.431). Bought a primary residence within the past year in Texas? It's time to file for your Texas Homestead Exemption. Eldorado Pkwy, McKinney, TX 75069. There is no fee to file the homestead exemption form. A property owner or the owner's authorized agent must file any necessary exemption form before May 1 of the tax year.