You must file with the county or city where your home is located. Each county has different applications and required documents.If you own and live in a house in Fulton County, you may qualify for homestead exemption. The purpose of this guide is to help Fulton County residents learn. Learn how the homestead exemption in Georgia can reduce your property taxes. Discover who qualifies, how to apply, and the types of exemptions available. You must own your home and reside in the home on January 1st of the year in which you apply for the exemption. The deadline to apply for a homestead exemption is April 1 to receive the exemption for that tax year. Homestead Exemption is one way to reduce the amount of property tax you pay on your residential property. Here are links to online Decatur's property tax exemption forms.