Connecticut State Business Tax Extension Filing Instructions
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Last modified 3/17/2023 7:35:55 AM EST |
Added by ExpressExtension Team
In addition to the federal extension, Businesses operating in Connecticut (Corporation, Partnerships, S-Corporations, and fiduciaries) are required to file a separate Business Tax Extension form to get an extension of time to file their Connecticut business income tax return.
Extension Form to use
- For C-corporation - Form CT-1120 EXT
- For Pass-through Entities - Form CT-1065/CT-1120SI EXT
- For Fiduciary - Form CT-1041 EXT
Due Date to file the Connecticut Extension Form
- Corporations - Taxyears ending with June 30 - 15th day of the 4th month after the tax year ends (October 15). For all other tax period endings- 15th day of the month following the due date of the company’s corresponding federal income tax return for the income year. (May 15 for calendar year taxpayers)
- Pass-through Entities - Returns are due the 15th day of the fourth month following the close of the tax year. Calendar year returns are due on April 15.
- Fiduciary & Estate - Returns are due the 15th day of the fourth month following the close of the tax year. Calendar year Estate returns are due on April 15.
Connecticut tax extension Filing Method (Paper/Electronic)
State of Connecticut Supports both Paper and Electronic filing.
How to pay the state tax due?
The extension of time to file does not extend the time to pay. You must pay your state tax due using any of the following options:
- Pay by Online
- Pay by Credit Card or Debit Card
- Pay by Mail
Does ExpressExtension support this State filing?
Yes, if you have received a waiver from electronic filing and payment requirements, you can file your Connecticut business tax extension with ExpressExtension in minutes. We support the completion and generation of your Connecticut business tax extension Form.
Any Special Requirements?
If you would prefer to mail your payment and file a paper copy of the extension form, you will need to request a waiver. To request a waiver from the electronic filing requirements visit portal.ct.gov/DRS and complete Form DRS-EWVR, Electronic Filing, and Payment Waiver Request.
For more information regarding Connecticut business state tax extension, click here.