You must file with the county or city where your home is located. Each county has different applications and required documents.For information and to apply for this homestead exemption, contact the Cook County Assessor's Office. Douglas County has additional exemptions. Applications are accepted in person year-round. If applying online, current year exemptions must be applied for between January 1 and April 1. To qualify for the Illinois homestead exemption, you must live in the state for at least 730 days. To qualify for the Illinois homestead exemption, you must live in the state for at least 730 days. Homestead exemption applications are accepted in person year-round. In Georgia, homeowners are able to receive a significant discount on property taxes if the home is their primary residence.