The State of Connecticut has issued the following guidance regarding income tax filing deadlines for individuals:
- The state filing deadline for a timely filing and payment is April 18th, 2023
- Use Form CT-1040 EXT to request a six-month extension to file your Connecticut income tax return for individuals. 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.