Connecticut Income Tax Information Calculators and Income Tax Tables Forms and Instructions Refund Questions File online Estimated Payments Amending a Return Payment Options Tax Assistance (DRS, VITA and Tax-Aide (AARP) Filing an Extension of Time to File Income Tax Mailing Addresses Questions about CHET Employee Issues Retiree Information DRS will not process returns that are missing the SSN or ITIN End of Filing Season Reminders April 15 is the due date for Connecticut income tax returns. For help with last minute questions, click here. Calculators and Income Tax Tables Income Tax Calculator Property Tax Credit Calculator Income Tax Tables Refund Questions Check on your Income Tax Refund Report a Lost, Stolen or Missing Refund Check using Form CT-3911 Am I entitled to Interest on My Refund? Amending a Previously Filed Return Correcting a mistake on a filed Return Employee Issues I Don't Have a W-2 Form Connecticut Residents Who Work in Another State Nonresidents Who Work in Connecticut Is My Connecticut Withholding Correct? Form CT-W4, Employee Withholding Certificate *Fill out and give to your employer if you need to change the amount of tax withheld. AN 2009(1), Information for Married Individuals or Civil Union Partners Who Are Both Employed and File a Joint Connecticut Income Tax Return Payment Options Payment Options/Payment Plans Common Filing Issues I received Form 1099-G and have questions Copy of a Previously Filed Return Property Tax Credit Military Personnel Part-Year Residents of Connecticut Nonresidents with Connecticut Source Income Nonresident Alien DRS will not process returns that are missing the SSN or ITIN Nonresident from Whom Connecticut Tax was Withheld in Error Spouses who file joint federal return but have different residency status for Connecticut Students (Residents and Nonresidents) Taxation of Income from federal, State, and municipal bonds and obligations Unemployment Compensation Retiree Information AN 2007(6), Taxability of Social Security Benefits for Connecticut Income Tax Purposes Pension Income IP 2008(24), Connecticut Tax Tips for Senior Citizens Estimated Payments Making Estimated Tax Payments Checking on the Amount of Estimated Payments Made Paperless Filing Options (Easy, Fast, and Secure) Electronically File a Connecticut Income Tax Return Electronically file Your Income Tax Extension (resident, part-year resident and nonresident) E-File (Online or With a Tax Preparer) Logging into the Taxpayer Service Center Forms and Instructions Forms and Instructions (Residents, Nonresidents, and Part-Year Residents) 2008 Estimated Tax Forms Amending a Previously Filed Income Tax Return Mailing Addresses for Connecticut Income Tax Returns CT-4852, Substitute for Forms W-2 and 1099-R Form W-2 (Should I include a copy with my return?)
