Sales and Use Tax Form OS-114
Fill out your Connecticut sales and use tax return.
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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 ServicesProvides Connecticut businesses information about withholding requirements.
Agency: Department of Revenue ServicesIT Capital Investment Program - Project Status Reports
Each agency receiving funds through the Information Technology Capital Investment Program must report semi-annually to the Information Technology Strategy and Investment Committee and OPM, IT Policy Director. The reports on this page are separated by those projects already completed (closed out) and projects still underway (Active).
Agency: Office of Policy and Management2025 - 2024 Monthly Comparative Statements
Agency: Department of Revenue Services2024 - 2023 Monthly Comparative Statements
Agency: Department of Revenue Services2023 - 2022 Monthly Comparative Statements
Agency: Department of Revenue Services