Illinois
The state of Illinois requires both a Withholding Tax ID and a State Unemployment Tax ID, both formats and links to apply are below.
Withholding Tax ID
Link to Apply: https://www2.illinois.gov/rev/research/taxinformation/WithholdingIncomeTax/Pages/default.aspx
Agency Contact Info: Department of Revenue 101 West Jefferson Street PO Box 3545 Springfield, IL 62702 217-782-3336
Format: ####-#### #########
Applied For: Not Accepted
Unemployment Tax ID
Link to Apply: https://ides.illinois.gov/unemployment/insurance.html
Agency Contact Info: Department of Employment Security 33 South State Street Chicago, IL 60603 1-800-247-4984 – Employer Service Hotline
Format: #######
Applied For: Not Accepted
After a new tax ID has been received, please send all documentation showing proof of the tax ID obtained to the Tax Department by submitting a Tax Ticket. Choose "Need to Add Tax Jurisdiction/Obtained Tax ID" from the ticket reason drop down. It's best practice to add new tax ID's before processing payment for employees within the jurisdiction.
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