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Avalara Help Center

Where can I find the IL-8633?


You want to know where to find the IL-8633 form so Avalara can file your Illinois return.



Avalara Returns




  • Illinois requires Avalara customers to complete the IL-8633 form.
  • Please complete document and send into your Implementation Consultant or 
  • Once the IL-8633 is received, then we can file your Illinois return
    • Note - if a return is filed without the completion of this document, Illinois will assess a penalty fee to the customer

You may also find this document when completing the Illinois filing calendar in the Avatax user interface



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