What do I need to enroll in AutoFile for Illinois?

To enroll in AutoFile for Illinois, you'll need the details listed below:

Illinois AutoFile Enrollment FAQ

What's my State Assigned Payment Schedule?
  • This is the filing frequency assigned to you by the Illinois Revenue Department.
  • If you're not sure of this detail for your account, you can contact the state's DOR and ask them to confirm this detail for you. (We list contact details for the states here.)
What's my First Filing Period?
  • Pending successful verification, the period listed here is the estimated first filing period TaxJar will file.
  • The First Filing period is based on the date the enrollment form is saved and the payment schedule.

What's my State Registered Business Name?
  • This is the business name you provided to the state when you registered for your sales tax license.
  • It should be listed on your sales tax registration paperwork.

What's my Illinois Account ID?
  • This is the 8 digit number you received from the state when you registered for your ST-1 account.
  • It should be listed on your sales tax registration paperwork.

What's my State Username and State Password?
  • This is the username and password used to gain access to your MyTax Illinois state account here

What's my Last Payment Amount?
  • This is the last payment you made for your sales tax account to the state of Illinois 
  • If you've never made a sales tax payment to Illinois,  please enter $0 as the payment amount.
What's my First Name and Last Name?
  • This is the first and last name on file with the state of Illinois.
What's my Business Phone number?
  • This is your daytime business phone number.

Additional Steps:


1. Update your Address of Nexus:
  • Update your Illinois Address of Nexus following these guidelines.
  • Add your Illinois in-state business address (do not add an Amazon FBA warehouse address as Address of Nexus).
  • Out of state sellers should leave Address of Nexus fields blank.

2.  Register the Correct Locations with the State:
  • Using these guidelines, register all Illinois selling locations with the state as permanent selling locations.
  • *Amazon FBA sellers must register all FBA warehouses as selling locations with the state

For more details about these credentials and registering for an Illinois sales tax permit, click here.
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