You must file with the county or city where your home is located. Each county has different applications and required documents.HOMESTEAD EXEMPTION FILING DATES ARE JANUARY 1st THROUGH April 1st. Effective June 1, 2005 homestead exemptions may be filed for any time during the year. Homestead exemption for persons sixty-five (65) years of age or over. The deadline for filing an application for a homestead exemption in Franklin County is March 1. To apply for a homestead exemption you must file an application with the Tax Assessor's office between January 2nd and April 1st.