IL-1040 WebFile

If you qualify for the Illinois Property Tax Credit, you will need your property number, sometimes called "property index number", "parcel number" or "permanent index number." This number is located on your county tax billl or assessment notice.

If your property tax is paid through your mortgage, you can contact your lender for a copy of your bill. You may also get this number from your county assessor's office. Click here for a list of counties.

Click here to WebFile.