If you are missing an exemption on your second installment property tax bill, you can apply online for a Certificate of Error beginning Monday, July 1, 2024. Applicants must file a Form PTAX-341, Application for Returning Veterans' Homestead Exemption, with the Chief County Assessment Office.Who qualifies for a Senior Freeze Exemption? I'm going to show you how to apply for the homeowner exemption online with the cook county assessor's office. The BOR accepts exemption applications for approximately 30 days, four times each year. The LongTime Homeowner Exemption enables property owners to receive an expanded Homeowner Exemption with no maximum exemption amount.