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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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IL-8633-B, Business Electronic Filing Enrollment

Who must complete Form IL-8633-B?

You must complete Form IL-8633-B if you are a software developer, transmitter, or participant using third party software to file returns and payments.

Note: Participants using our free MyTax Illinois program should not complete Form IL-8633-B unless they plan to use the Illinois Electronic Filing Program in addition to the MyTax Illinois Program.