A property tax exemption is like a discount applied to your EAV. If you qualify for an exemption, it allows you to lower your EAV.Each year applicants must complete and file Form PTAX-340 with the Chief County Assessment Officer. Illinois veterans and persons with disabilities may be eligible for tax relief through the property tax homestead exemptions and mobile home exemptions. How can a homeowner see which exemptions were applied to their home? Check the Property Details, then review the Exemption History and Status section. This will allow you to identify the correct parcel for your owner occupied primary residence. You can get an application here General Homestead Exemption Form or you can call 630-208-3818 and one will be mailed to you. Senior Citizen Homestead Exemption. Homestead Improvement Exemption.