Supporting documentation is required with this application to verify applicant's identity, property occupancy, and property tax liability. Exemption applications must be filed with your local assessor's office.See our Municipal Profiles for your local assessor's mailing address. You should make a copy of your completed renewal application to keep for your records. The BOR accepts exemption applications for approximately 30 days, four times each year. Link to obtain further information about the various exemptions that are offered, the documents and filing process required for each exemption to be claimed. How and when to get my homeowners exemption for property taxes in Illinois? When completing this recertification form, and contact your social services district with any questions. Fornia and Atlas Corp_____ 1993. Trans-Pacific route case_____ 1994.