Information for Businesses
- Starting a Business?
- File & Pay Online
- Reset/Change Admin Business Password
- Business Tax Help
- Sales & Use Tax
- Corporation Business Tax
- Withholding Tax
More for Businesses
- Amend a business return
- Business Tax Payment Options
- Calendar of Due Dates
- CERC - CT Economic Resource Center
- Change Business Address
- Change Business Name
- Change Business Structure
- Close a business
- e-Services Information
- File a protest
- Forms & Instructions
- Obtain tax clearance - business only
- Obtain status letter
- Attorney Occupational Tax
- Report a lost or stolen check
- Sales & Use Tax Filing information