The Illinois Omitted Assessment Exemptions are a set of exemptions that are available to property owners who have failed to pay their property tax assessments. There are two types of exemptions: the Homestead Exemption and the Senior Citizen Real Estate Tax Deferral Program. The Homestead Exemption allows homeowners to receive a reduced assessment on their primary residence if they have owned the property for at least three years. The Senior Citizen Real Estate Tax Deferral Program allows seniors to pay their taxes over a five-year period, with interest. Both exemptions are available to property owners in all Illinois counties.