Connecticut State Department of Consumer Protection

We are currently experiencing issues with our voicemail system. If you are unable to leave a message, we recommend sending an email to the appropriate division/person. You can view the complete list. We apologize for any inconvenience.

Information for Businesses

  1. Starting a Business?
  2. File & Pay Online
  3. Reset/Change Admin Business Password
  4. Business Tax Help
  5. Sales & Use Tax
  6. Corporation Business Tax
  7. Withholding Tax

More for Businesses

  1. Amend a business return
  2. Business Tax Payment Options
  3. Calendar of Due Dates
  4. CERC - CT Economic Resource Center
  5. Change Business Address
  6. Change Business Name
  7. Change Business Structure
  8. Close a business
  9. e-Services Information
  10. File a protest
  11. Forms & Instructions
  12. Obtain tax clearance - business only
  13. Obtain status letter
  14. Attorney Occupational Tax
  15. Report a lost or stolen check
  16. Sales & Use Tax Filing information