Connecticut State Department of Revenue Services

- Sunset of the single-use plastic bag fee: Read more

- Back to Work CT incentive for those returning to the workforce: Read more

- Learn more about myconneCT

Sales and Use Tax Returns

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

Name Description Revised Date Due Date
OS-114 Sales and Use Tax Return 07/2021 Varies
O-88 Instructions for OS-114 07/2021 N/A

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


Other Sales Tax Forms