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AN 96(3.1), Information About Supplemental Withholding Tables For Joint Filers Who Both Earn Wage Income
IP 2009(19), Paying Connecticut Taxes by Electronic Funds Transfer
IP 2008(20), Estimated Connecticut Income Taxes
PS 2007(4), Connecticut Tax Treatment of Eligible Productions Companies, Payroll Services Companies, and Loan-Out Companies
Electronic Filing Requirements Frequently Asked Questions
Research and Development (Nonincremental) Expenses 25JAN2017
IP 2015(20) (SP), Credito Tributario por Ingreso del Trabajo de Connecticut Requisitos de Mantenimiento de Registros Para Trabajadores por Cuenta Propia
2012 Unrelated Returns
IP 2005(30), Paying Connecticut Taxes by Electronic Funds Transfer
Excise Tax Forms
Other Helpful Foreign Insurance Tax Information
Youth Development Organization Contribution
Connecticut Department of Revenue Services Announces Start of 2025 Tax Season
Research and Development Nonincremental Expenses 22MAR2022
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