(35 ILCS 200/18-145)
Error in calculation of rate or extension.
other provision of law to the contrary, if, because of an error in the
calculation of tax rates or extension of taxes by the county clerk, the taxes
paid on any property are higher than required by law, the county clerk shall in
the following year abate an amount equal to the excess taxes from the property
taxes extended for any tax levy or fund affected by the error. This Section
shall not deprive any taxpayer of the right to maintain a tax objection under
Sections 23-5 and 23-10 challenging the legality of the county clerk's actions;
but the amount of any subsequent tax abatement shall be credited toward the
payment of any refund ordered by the court.
(Source: P.A. 86-422; 88-455.)