Connecticut State Tax Extension
If you have already filed for federal extension ( Form 4868 ) then the Connecticut state income tax extension
for individual is granted automatically. In case if you did not file form 4868 then you can apply for 6 month
extension by using Form CT-1040EXT.
Similarly,the business income tax extension is also granted for 6 months if the federal return ( Form 7004) is already filed. However, you can apply for state extension using CT-1120 EXT if federal return was not applied.
Use Form CT-1120 EXT, Application for Extension of Time to File Corporation Business Tax Return, to request a six-month extension to file Form CT-1120, Corporation Business Tax Return, Form CT-1120CR, Combined Corporation Business Tax Return, or Form CT-1120U, Unitary Corporation Business Tax Return. It is not necessary to include a reason for the Connecticut extension request if an extension on federal Form 7004, Application for Automatic Extension of Time to File Certain Business Income Tax, Information, and Other Returns, was filed with the Internal Revenue Service.
If federal Form 7004 was not filed, the corporation may apply for a six-month extension to file the Connecticut corporation business tax return if there is reasonable cause for the request. Form CT-1120 EXT extends only the time to file the Connecticut corporation business tax return. Form CT-1120 EXT does not extend the time to pay the amount of tax due.
This return can be filed electronically through the Department of Revenue Services (DRS) Taxpayer Service Center (TSC). The TSC allows taxpayers to electronically file, pay, and manage state tax responsibilities. If you file electronically you are expected to pay electronically at the time of filing.
Pay Electronically: After logging into the TSC, select the Make
Payment Only option and choose a tax type from the drop down box. Using this option
authorizes DRS to electronically withdraw a payment from your bank account (checking
or savings) on a date you select up to the due date. As a reminder, even if you
pay electronically you must still file your return on or before the due date. Tax
not paid on or before the due date will be subject to penalty and interest.
Pay by Credit Card or Debit Card: You may elect to pay your tax liability using a credit card (American Express, Discover, MasterCard, or VISA) or comparable debit card. A convenience fee will be charged by the service provider. You will be informed of the amount of the fee and you may elect to cancel the transaction. At the end of the transaction you will be given a conï¬ rmation number for your records.
There are three ways to pay by credit card or comparable debit card:
- Log in to your account in the TSC and select Make Payment by Credit Card;
- Visit: http://www.officialpayments.com and select State Payments; or
- Call Ofï¬cial Payments Corporation toll-free at 1-800-2PAY-TAX (1-800-272-9829) and follow the instructions. You will be asked to enter the Connecticut Jurisdiction Code: 1777. Your payment will be effective on the date you make the charge. Do not send in Form CT-1120 EXT if payment is made through the credit card service provider. All credit or debit card payments for extension requests will be accepted by the credit card service provider. However, if your payment is late, DRS will notify you in writing that your request for extension of time to file is denied.
Interest and Penalty
Interest is assessed at 1% per month or fraction of a month on any underpayment of tax computed from the ï¬rst day of the fourth month following the close of the income year. The penalty for underpayment of tax is 10% of the tax due or $50, whichever is greater. If no tax is due, the Commissioner of Revenue Services may impose a $50 penalty for the late ï¬ ling of any return or report that is required by law to be filed. Use Form CT-1040 EXT to request a six-month extension to file your Connecticut income tax return for individuals. This form also extends the time to file your individual use tax. It is not necessary to include a reason for the Connecticut extension request if you have already filed an extension request on federal Form 4868 with the Internal Revenue Service. If you did not file federal Form 4868, you can apply for a six-month extension to file your Connecticut income tax return provided you have good cause for your request. Form CT-1040 EXT only extends the time to file your Connecticut income tax return. Form CT-1040 EXT does not extend the time to pay your income tax. You must pay the amount of tax that you expect to owe on or before the original due date of the return.
Interest and Penalty
In general, interest and penalty apply to any portion of the tax not paid on or before the original due date of the return. Interest is computed on the underpayment of tax at 1% per month or fraction of a month computed from the original due date to the date of payment.
Late Filing Penalty:
If no tax is due, DRS may impose a $50 penalty for the late
filing of any return or report that is required by law to be filed.
Late Payment Penalty: The penalty for underpayment of tax is 10% of the tax that is not paid on or before the original due date of the return.
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