Sales and Use Tax Form OS-114
Fill out your Connecticut sales and use tax return.
Revenue
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2023 - 2022 Monthly Comparative Statements
Agency: Department of Revenue Services -
2024 - 2023 Monthly Comparative Statements
Agency: Department of Revenue Services -
Business Registration Information
Detailed information about registering a business with the Department of Revenue Services (DRS).
Agency: Department of Revenue Services -
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 -
The Department of Revenue Services (DRS) Income Tax Portal for Individuals helps residents and part-year residents get the filing requirement information, income tax information and resources they need.
Agency: Department of Revenue Services -
CT Income Tax: Free Assistance Locations
Connecticut taxpayers can receive income tax preparation help through the Department of Revenue (DRS), the Association of American Retired Persons (AARP), the Volunteer Income Tax Assistance Program (VITA), Community Accounting Aid and Services, Inc. (CAAS) and the University of Connecticut Law School Tax Clinic.
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 -
The Collections department is made up of the Billing Unit, Recovery Unit, Delinquent Accounts Unit, and the Connecticut State Tax Intercept Program.
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Estate and Gift Tax, Succession Tax, Trust and Estate Income Tax
Find estate, gift, fiduciary, trusts, and succession tax information and forms here.
Agency: Department of Revenue Services -
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 -
Guide to Connecticut Business Tax Credits
Business tax credit information for a variety of industries.
Agency: Department of Revenue Services -
IT Capital Investment Program - Project Status Reports
Each agency receiving funds through the Information Technology Capital Investment Program must report semi-annually to the Information Technology Strategy and Investment Committee and OPM, IT Policy Director. The reports on this page are separated by those projects already completed (closed out) and projects still underway (Active).
Agency: Office of Policy and Management -
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 -
Real and Personal Property Tax Inquiries
While people with general questions about the state's property taxes can contact the Office of Policy and Management, any inquiries about a tax bill or mill rate on real property, such as a home, or personal property, like a motor vehicle should go to the tax collector in the town in which the property is located.
Agency: Department of Revenue Services
