Illinois
Last Updated August 16, 2017
State Tax Guidelines
Illinois Department of Revenue – Withholding Tax
Agency Information
Add to existing company setup
Submit a request to your service team to add IL (withholding) to your company setup. Please include the below with your request:
- Withholding – Withholding account number and Deposit Frequency. If you’re unsure of your deposit frequency or account number you can call the agency at 217-782-3336.
- Power of Attorney- POA is required, please obtain the prefilled form from your client service representative.
Register a new company
Illinois Department of Employment Security – Unemployment tax
Agency Information
Add to existing company setup
Submit a request to your service team to add ILSUI (unemployment) to your company setup. Please include the below with your request:
- Unemployment – Account Number and Tax rate. This can be found on a Tax Rate Notice or the Quarterly contribution report. If you’re unsure of your tax rate or account number, you can call the agency at 800-247-4984.
- Power of Attorney – POA is required, please obtain the prefilled form from your client service representative.
