Further Notices of Deficiency Restricted
35 ILCS 5/906
in effect(35 ILCS 5/906) (from Ch. 120, par. 9-906) Sec. 906. Further Notices of Deficiency Restricted. If a protest has been filed with respect to a notice of deficiency issued by the Department with respect to a taxable year, and the decision of the Department on such protest has become final, the Department shall be barred from issuing a further or additional notice of deficiency for such taxable year, except in the case of fraud, mathematical error, a return that is not considered processable, as the term is defined in Section 3-2 of the Uniform Penalty and Interest Act, or as provided in section 905(d), (e), or (g). (Source: P.A. 89-399, eff. 8-20-95.)
Source: Open US Law by Vaquill AI (CC BY 4.0)URL: https://www.ilga.gov/legislation/ilcs/ilcs.aspFetched: 10/17/2026