35 ILCS 5/918

Place of Hearings. All hearings provided for in this Act and not otherwise delegated to the Illinois Independent Tax Tribunal with respect to or concerning a taxpayer having his residence or commercial domicile in this State shall be held at the Department's office nearest to the location of such residence or domicile, except that if the taxpayer has his residence or commercial domicile in Cook County, such hearing shall be held in Cook County. If the taxpayer does not have his residence or commercial domicile in this State, such hearing shall be held in Cook County.