State Registration

Obtain a Tax Registration Number
If you do not have a Connecticut Tax Registration Number or need to register additional locations, register your business with the Connecticut Department of Revenue Services online service.

NOTE: Only the Connecticut Department of Revenue Services can issue Connecticut tax registration numbers for sales tax, withholding tax and all other state taxes we administer

Obtain Correct Business Licenses
The State of Connecticut’s requires new businesses to obtain certain licenses which correspond to their available services. The cost of the license will depend on the trade or occupation. Visit the Connecticut Licensing Info Center ( for a list of all the licenses required by the state.

Featured Resources
View for more resources on registering your business at the state and federal levels.