Sales and Use Tax Form OS-114
Fill out your Connecticut sales and use tax return.
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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
Detailed information on registration and filing requirements for the corporation business tax.Agency: Department of Revenue Services
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
Business tax credit information for a variety of industries.Agency: Department of Revenue Services
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
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
Connecticut employers can file unemployment taxes, get necessary forms, and understand benefit payment procedures here.Agency: Department of Labor
Provides Connecticut businesses information about withholding requirements.Agency: Department of Revenue Services
Filing for an Extension of Time to File
Use Form CT-1040 EXT to request a six-month extension to file your Connecticut income tax return for individuals.