COVID-19 Updates: Get the latest information on COVID-19 in Connecticut at ct.gov/coronavirus.
Vaccine Appointments: Find a COVID-19 vaccination clinic near you and learn how to schedule an appointment at ct.gov/covidvaccine.
- CT filing, payment deadlines for individual income tax returns extended to May 17th. Read more.
- Please check our 2021 CT Tax Filing Season FAQ's
- Learn more about myconneCT
- Walk-in services at all DRS branch office locations remain suspended.
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IP 2009(35), Estimated Connecticut Income Taxes
IP 2009(20), Federal/State Electronic Filing Handbook
IP 2009(30), A Guide to Calculating Your Annualized Estimated Income Tax Installments and Worksheet CT-1040 AES
IP 2009(15), Notice to Retailers on Sales and Use Tax Resale Certificates
IP 2009(26), A Guide for Filers of Multiple Form CT-1041ES
IP 2009(37.1), 2009 Connecticut Income Tax Changes Affecting Withholding Requirements and the 2009 Fourth Quarter Estimated Payment
IP 2009(25), Personal Taxes
IP 2009(18), Form W-2 Electronic Filing Requirements
IP 2009(38), Connecticut Income Tax Treatment of State Lottery Winnings Received by Residents and Nonresidents of Connecticut
IP 2009(14), Fisherman's Guide to Sales and Use Taxes and Estimated Income Tax
IP 2009(7), Is My Connecticut Withholding Correct?
IP 2009(11), Unlawful Advertisements Referring to Sales Tax
IP 2009(36), Connecticut Income Tax Treatment of Gambling Winnings Other Than State Lottery Winnings
IP 2009(21), Connecticut Income Tax Information for Armed Forces Personnel and Veterans
IP 2009(12), Q & A on the 2009 Connecticut Tax Amnesty Program