35 ILCS 200/21-175
Defenses to the entry of judgment against properties included in the delinquent list shall be entertained by the court only when: (a) the defense includes a writing specifying the particular grounds for the objection; and (b) except as otherwise provided in Sections 14-15, 14-25, 23-5, and 23-25, the taxes to which objection is made are paid under protest under Section 23-5 and a tax objection complaint is filed under Section 23-10.
If any party objecting is entitled to a refund of all or any part of a tax paid, the court shall enter judgment accordingly, and also shall enter judgment for the taxes, special assessments, interest and penalties as appear to be due. The judgment shall be considered as a several judgment against each property or part thereof, for each kind of tax or special assessment included therein. The court shall direct the clerk to prepare and enter an order for the sale of the property against which judgment is entered. However, if a defense is made that the property, or any part thereof, is exempt from taxation and it is demonstrated that a proceeding to determine the exempt status of the property is pending under Section 16-70 or 16-130 or is being conducted under Section 8-35 or 8-40, the court shall not enter a judgment relating to that property until the proceedings being conducted under Section 8-35 or Section 8-40 have terminated.
35 ILCS 200/21-175