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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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What is an Illinois withholding exemption?

An Illinois withholding exemption is the portion of your payments on which you do not withhold Illinois Income Tax. This amount is calculated based on the number of allowances claimed on  Form IL-W-4, Employee’s and other Payee's Illinois Withholding Allowance Certificate and Instructions.

See Booklet IL-700-T, Illinois Withholding Income Tax Tables, for the exact amount of tax to withhold based upon the amount of allowances claimed.

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