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Scam Alert: Fake Texts and Websites Impersonating IDOR

Be alert for fraudulent messages or websites attempting to steal your banking information, login credentials, or credit card details. The Illinois Department of Revenue (IDOR) will never request personal or financial information via text message. To confirm official communications or contact details, always visit https://tax.illinois.gov.

Employment Sign Up for Updates

ST-556-LSE

Form ST-556-LSE can be filed electronically using MyTax Illinois, our FREE online account management program. If you have not already done so, you will need to activate your account by clicking on the "Sign up Now!" button at mytax.illinois.gov.

Click here to go to MyTax Illinois to file your return online

Alternatively, you can obtain ST-556-LSE forms preprinted for each of your business locations by calling our Central Registration Division at 217 785-3707.