Connecticut
Last Updated August 10, 2017
State Tax Guidelines
Connecticut Department of Revenue Services – Withholding Tax
Agency Information
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Account ID Format: 1234567-999 or 12345678-999
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:
- 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
- Power of Attorney – POA is required, please obtain the prefilled form from your client service representative.
Register a new company
Connecticut Department of Labor, Employment Security Division – Unemployment tax
Agency Information
- Visit the Website
- Employer Status Unit: 860-263-6550
- General information: 860-263-6000
- Account ID Format: 1234567
Add to existing company setup
Submit a request to your service team to add CTSUI (unemployment) to your company setup. Please include the below with your request:
- 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.
