Connecticut
Last Updated August 10, 2017
Agency Information
Connecticut Department of Revenue Services – Withholding Tax
Connecticut Department of Labor, Employment Security Division – Unemployment tax
Add to existing company setup
Submit a request to your service team to add CT (withholding) and/or CTSUI (unemployment) to your company setup. Please include the below with your request:
Connecticut Department of Revenue Services
- Withholding – Deposit Frequency and Account number. If you’re unsure of your deposit frequency or account number, you can call the agency at 860-297-5962.
Connecticut Department of Labor, Employment Security Division
- Unemployment – Tax rate and Account number. 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 860-263-6550.
Power of Attorney – POA is required, please obtain the prefilled form from your client service representative.
Register a new company
Connecticut Department of Revenue Services
Register online at http://www.ct.gov/drs/cwp/view.asp?a=1509&q=266240. Select Register a New Business Online, and follow the prompts. You will receive a temporary account number, please Do Not provide this number to your service team. You will receive your permanent CT Tax Registration Number and tax deposit frequency within 7 – 10 business days.
Connecticut Department of Labor, Employment Security Division
Register online at https://www.ctdol.state.ct.us/uitax/txmenu.htm and follow the prompts. You should receive your CT Unemployment Number instantly, followed by a confirmation letter in the mail within 7 days.
Third Party Registration and/or Power of Attorney Instructions
Power of Attorney is required, please obtain the prefilled form from your client service representative.