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Avalara Help Center

Illinois Additional Questions

IL Required Information

To file the IL ST1 form you will need to enter the following information:

  • Verify whether a physical location is registered in IL - Enter Y if your business has only one location in Illinois. Enter N if your business has no locations registered in the state of Illinois. If you choose this option, excess tax will be reported when tax is collected at rates other than the state rate. (Note that TrustFile does not support multi-location filing s if you have multiple locations in IL we are unable to file your return in TrustFile)
  • Have you completed form IL-8633 and submitted it to the Illinois DOR? - Please Note: Because you are filing in the state of IL, you must also fill out and file Form IL-8633 and send it to the Illinois Department of Revenue before continuing. Entering 'yes' confirms that you understand this is required and that failure to complete form IL-8633 may result in notices.


IL State Settings.PNG

Below is an example of the sections required to be filled out on form IL-8633. The example also includes all of the Avalara information that needs to be included on the form.  



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