DCAD is pleased to provide this service to homeowners in Dallas County. For your homestead exemption through your county tax commissioner's.You must file a document called a "Declaration of Homestead". Must be filed with assessors on or before April 1, or 3 months after actual (not preliminary) tax bills are mailed for fiscal year if later. You may file a late application for a Residence Homestead Exemption no later than one year after the tax delinquency date. Edit, sign, and share Form 50-114-A Residence Homestead Exemption Affidavits - Texas online. (1) Creation of a separate form for chapter 7 meanstest exemption. Online Rendition will be available from your Dashboard starting Friday, January 3rd! Use SmartAsset's tools to better understand the average cost of property taxes in your state and county. Enter your financial details to calculate your taxes.