Disabled applicants must complete form DTE 105E,. You are eligible for the homestead exemption if the trust agreement contains a provision that says you have complete possession of the property.This exemption lasts up to four years. Application Due Date: No application is required. You must provide proof of enrollment in 2021 and do not need to fill out the income verification to the right. Join us for a workshop to learn about the Cook County Assessor's Office and homeowner exemptions. The BOR accepts exemption applications for approximately 30 days, four times each year. This Video Shows you How to Complete an Application for Homestead Exemption. The homestead can't exceed one acre in a city or 160 acres in a rural area. Property tax exemptions are savings that contribute to lowering a homeowner's property tax bill.