Ct Tax Day 2024 Calendar. Connecticut sales tax holiday calendar. Your connecticut income tax return is due on or before april 15, 2024.

This document provides a comprehensive guide to the important due dates, forms to be filled out, period, and who should file for income tax compliance, provident. If you are not a calendar year filer, your return is due on or before the fifteenth day of the fourth month following the close of your taxable year.