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Scam Alert: The DRS is alerting taxpayers to a new scam where scammers are impersonating DRS by sending fraudulent text messages. For more information, see TSSB 2025-6.
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IP 2012(16), A Guide to Calculating Your Annualized Estimated Income Tax Installments and Worksheet CT-1040 AES
IP 2007(13), Fisherman's Guide to Sales and Use Taxes and Estimated Income Tax
IP 2018-15
IP 2012(25), 2012 Federal/State Electronic Filing Handbook
IP 2007(10), Sales and Use Tax Exemptions for Prescription and Nonprescription Drugs and Medicines and Health-Related Products
IP 2012(9.1), Connecticut Earned Income Tax Credit Recordkeeping Suggestions for Self-employed Persons
IP 2007(7), Is My Connecticut Withholding Correct?
IP 2019-3
IP 2019-2
IP 2019-5
IP 2006(7), Is My Connecticut Withholding Correct?
IP 2012(15), Connecticut Income Tax Information for Armed Forces Personnel and Veterans
IP 2006(15), Guide to Connecticut Business Tax Credits
IP 2019-7
IP 2004(11), Connecticut Managed Compliance Program
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