Revenue

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• File, Pay, and View Business Account Transactions

  Businesses that have a Connecticut Tax Registration Number (CT REG) can use the Taxpayer Service Center ( TSC-BUS ) to file, pay, view tax transactions, and update the business's account information. 

  Agency: Department of Revenue Services

• Sales Tax Information

  Provides business owners information about registering a business, sales and use taxes, exemption certificates, filing and amending sales tax returns, renewing a sales tax permit and closing a business.

  Agency: Department of Revenue Services

• Business Taxes

  A brief description of taxes generally applicable to companies doing business in Connecticut. It is not an all-inclusive list, but contains those taxes of interest to most businesses and, where appropriate, identifies state agencies to contact for additional information.

  Agency: Department of Revenue Services

• Corporation Business Tax Information

  Detailed information on registration and filing requirements for the corporation business tax.

  Agency: Department of Revenue Services

• CT Income Tax: Where’s My Refund

  Citizens can check the status of an income tax refund online through the Taxpayer Service Center or by using the telephone automated refund system.

  Agency: Department of Revenue Services

• Mill Rates

  A mill rate is the rate that's used to calculate your property tax. To calculate the property tax, multiply the assessment of the property by the mill rate and divide by 1,000. There are different mill rates for different towns and cities.

  Agency: Office of Policy and Management

• Unemployment Insurance Tax Information

  Connecticut employers can file unemployment taxes, get necessary forms, and understand benefit payment procedures here.

  Agency: Department of Labor