Section 35 ILCS 200/20-190 - Statute of limitation for collection of delinquent real estate taxes and special assessments(a) If a taxpayer owes arrearages of taxes for a reason other than administrative error, actions for the collection of any delinquent general tax, or the enforcement or foreclosure of the tax lien shall be commenced within 20 30 years after the tax became delinquent, and not thereafter. After 20 30 years the tax lien shall be discharged and released. Actions for the collection of any delinquent installments of special assessments or special taxes, or the enforcement or foreclosure of the special assessment lien shall be commenced within 30 years after the installments became delinquent. After 30 years the lien for the installments shall be discharged and released.
(b) If a taxpayer owes arrearages of taxes due to an administrative error, the county may not bill, collect, claim a lien for, or sell the arrearages of taxes for tax years earlier than the 2 most recent tax years, including the current tax year.(c) For purposes of this Section, "administrative error" includes but is not limited to failure to include an extension for a taxing district on the tax bill, an error in the calculations of tax rates or extensions or any other mathematical error by the county clerk, or a defective coding by the county, but does not include a failure by the county to send a tax bill to the taxpayer, the failure by the taxpayer to notify the assessor of a change in the tax-exempt status of property, or any error concerning the assessment of the property.P.A. 88-455; 89-617, eff. 9/1/1996; 92-201, eff. 1/1/2002.