Highway Use Fee - Registration is now open for certain carriers to register for the new Connecticut Highway Use Fee - Click here for more information.

IMPORTANT INFORMATION - the following tax types are now available in myconneCT: Individual Income Tax, Attorney Occupational Tax, Unified Gift and Estate Tax, Controlling Interest Transfer Tax, and Alcoholic Beverage Tax. - Click here for the latest information.

Sales and Use Tax Returns

Filers of Form OS-114BUT must now use Form OS-114

File electronically on myconneCT

Revised Date Due Date
OS-114 Sales and Use Tax Return 02/2022  Varies
O-88 Instructions for OS-114 07/2022 N/A

Tax Chart

Revised Date
Due Date
OR-149  Sales and Use Tax Rate Chart  11/2019 N/A

Other Sales Tax Forms