Sales and Use Tax Form OS-114
Fill out your Connecticut sales and use tax return.
Revenue
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Unemployment Insurance Tax Information
Connecticut employers can file unemployment taxes, get necessary forms, and understand benefit payment procedures here.
Agency: Department of Labor -
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 -
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 -
Provides Connecticut businesses information about withholding requirements.
Agency: Department of Revenue Services -
Taxpayer Service Center (TSC) Online Business Help
The TSC online help page provides information about how to file most state tax returns, view balances, and schedule payments.
Agency: Department of Revenue Services -
Tax Information for Veterans and Armed Forces Personnel
Veterans and Armed Forces Personnel can view tax information, definitions and special rules on the filing status of spouses, exemptions and tax relief provisions.
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: 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 -
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 -
Business Registration Information
Detailed information about registering a business with the Department of Revenue Services (DRS).
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 -
Guide to Connecticut Business Tax Credits
Business tax credit information for a variety of industries.
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 -
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
