Connecticut State Department of Revenue Services

NOTICE: Taxpayers are strongly encouraged to visit the DRS website for answers to many questions. You may also email DRS at drs@po.state.ct.us. If contacting DRS by phone, please plan for wait times that may be longer than usual. See DRS FAQ's, which now include important information regarding Connecticut sales tax. Frequently Asked Questions

Taxpayer Services Center (TSC-BUS)   

File Returns, Make Payments, Update Information and More

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