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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.

Report Business Income Tax Fraud Online Form

Please provide as much information as possible in the blanks below. You may remain anonymous if you wish.

Note: Anonymous complaints may not be able to be investigated.

Note: Use this online form to report fraud related to Business Income Taxes only. Do not use this form to report fraud related to Sales and Use Taxes. To report Sales and Use Tax Fraud, use the "Sales and Use Tax, Cigarette Tax, Tobacco Tax, Motor Fuel Tax, and 'Other' Fraud" online form.

Please review Violation Descriptions.

* indicates required field


Your Information


(SSN, DOB)


Violator Information


(SSN, DOB)

Provide information regarding violator's business or employees (names, how they earn income, do they hide income, etc.)