Illinois Compiled Statutes 50 ILCS 45/50 – Late filing penalties
Current as of: 2024 | Check for updates
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Late filing penalties may not exceed 5% of the amount of tax required to be shown as due on a return. A late filing penalty may not apply if a failure to file penalty is imposed by the unit of local government. A local tax administrator may determine that the late filing was due to reasonable cause and abate the penalty.