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Possible online services disruption due to Internet related outage

A worldwide technology outage is causing disruption to some State of Illinois online systems.  We are aware of this issue and are diligently working on restoration.

AH-4

Use this form to file an official protest with the Illinois Department of Revenue and request an administrative hearing in response to any of the following notices that offer protest rights:
• Notice of Tax Liability (NTL)
• Notice of Personal Liability (NPL)
• Claim Denial​