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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.

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When is my tax payment due?

Due dates for tax payments are dependent on what type of tax is owed. Refer to the return instructions for each tax type you are required to pay for specific dates.

For more information on Illinois taxes, visit the Tax Information section of our website.

For more information about property taxes, visit the General Property Tax Information and Resources web page.

If you have additional inquiries, you may submit them on the Questions, Comments, or Requests form.