Illinois
Illinois Last Updated August 16, 2017 Agency Information Illinois Department of Revenue – Withholding Tax Visit the Website 217-782-3336 Account ID Format: 123456789-000 Illinois Department of Employment Security – Unemployment tax Visit the Website 800-247-4984 Account ID Format: 1234567 Add to existing company setup Submit a request to your service team to add IL (withholding) and/or…