Home / Tax Resources / State And Federal / Efile-Connecticut-Tax-Return Efile Connecticut State Tax Returns Start For Free Connecticut State Tax Filing Information The eSmart Tax online tax return filing solution makes it easy to efile your Connecticut state tax return using the correct state tax forms. Prepare your full-year resident Connecticut state tax return alongside your federal tax return for your convenience. The regular deadline to file an Connecticut state income tax return is April 15. Find additional information about Connecticut state tax forms, Connecticut state tax filing instructions, and government information. eSmart Tax supports the following Connecticut Tax Forms (Click here to download Connecticut tax forms ) Connecticut Form 1040 Individual Resident Income Tax Return Connecticut Form 1040V Electronic Filing Payment Voucher Connecticut Schedule CT-EITC Earned Income Tax Credit State CT Website and Contacts State Website http://www.ct.gov/drs/site/default.asp Taxpayer Assistance: (860) 297-5962 TTY/TTD: (860) 297-4911 Refund Status: (860) 297-4911 Refund Status (Automated Response): (860) 382-9463 (860)297-5962 Check Refund Status Online: https://drsindtax.ct.gov/AUT/welcomeindividual.aspx PIN Availability: Type: Notes: Supported State assigned Only required for PC filers. eSmartTax users are not required to obtain a PIN. Liberty eSpecial: $50 Off Tax Prep! Special Processing Type: Availability: State-only tax return: Supported It is strongly recommended that State return be sent originally along with the Federal return. Decedent Return: Not supported by state e-file Return with foreign address: Supported Signature Form Form Name: Instructions: DR-8454 Do not mail in DR-8454. Keep it for your own record. State CT Overpayment Option You have the following options to pay your tax: Apply your refund amount to next year's tax payment. Contribute your refund amount to charity. Receive your refund by check through mail. Receive your refund by direct deposit to your bank account. State CT Amount Owe Payment Option You have the following options to pay your tax: You may pay your Connecticut income tax payment using your Discover®, MasterCard® , Visa, or American Express Card®. A convenience fee of 2.49% of the amount you are charging to your card will be charged by the credit card service provider. You will be informed of the amount of the convenience fee during the telephone call and you may elect to cancel the transaction. Telephone Official Payments Corporation toll-free at 1-800-2PAY-TAX (1-800-272-9829) and follow the voice prompts. Have your credit card ready. You will be asked to enter your 4-digit jurisdiction code. The 4-digit code for Connecticut is 1777. Follow the voice prompts to complete the transaction. A convenience fee of 2.49% of the amount you are charging to your card will be charged by the credit card service provider. At the completion of the transaction you will be given a confirmation number for your records; or Visit Official Payments Website (www.officialpayments.com). You will need to enter the Connecticut Jurisdiction Code: 1777. A convenience fee of 2.49% of the amount you are charging to your card will be charged by the credit card service provider. At the completion of the transaction you will be given a confirmation number for your records.Your payment will be effective on the date you make the charge. To be timely, you must initiate the credit card payment no later than the due date (April 15, 2009). Send e-payment through the state website. (http://www.ct.gov/drs/cwp/view.asp?a=1433&Q=265878&PM=1) Make your check or money order payable to the "Commissioner of Revenue Services." Mail the check with your return or with the payment coupon provided by DRS. To ensure proper posting of your payment write on the front of your check or money order: the last 4 digits of your Social Security Number(s) and "2008 Connecticut Income Tax" Be sure to sign your check and paper clip it to the front of your return. Do not send cash. Remember: To avoid penalty and interest, your balance must be paid on or before the due date of the return. To be timely, the check must be received or must bear a U.S. postmark on or before that date. For other timely mailing options see the Connecticut income tax instructions for mailing the return. Any balance still outstanding as of April15, 2008is generally subject to 10% penalty. Interest will also be assessed at the rate of 1% per month or fraction of a month until payment is made. Request an extension of time to pay: If you cannot pay all that you owe by the due date and would like to request an extension of time to pay: File the return on time and pay as much as possible. If you are requesting an extension of time to pay the tax, complete Form CT-1127 and attach it to the front of the Connecticut income tax return. If the extension is granted and you pay all that is due by Oct. 15, the 10% penalty will be waived. Interest at 1% per month or fraction of a month on the unpaid amount will apply. Do not wait for us to contact you about the extension request. You can begin making payments right away and continue making payments as often as you can. The interest charge will be less if you continue to reduce the balance due. (OPTIONAL) To ensure proper posting of your payment, we suggest that you writethe last four digits of yourSocial Security Number(s) and "2008 Connecticut Income Tax" on the front of your check or money order. Mail the check to: Department of Revenue Services Accounts Receivable Unit P.O. Box 5088 Hartford, CT 06102-5088 Request a Short-Term Payment Plan: If you do not pay everything that you owe with your return, you will receive a bill for the balance due after April 15. If you wish to request a payment plan, complete Form TPG-171 ( http://www.ct.gov/drs/lib/drs/rightnow/statusletters/TPG-171.pdf ).