Connecticut Income Tax 2025. Social security benefit adjustment worksheet; The connecticut department of revenue services (department) posted a summary of tax legislation enacted in 2025, including legislation that:

The fund pursues income free from federal income tax with a portfolio of municipal bonds selected from many states and market sectors. For tax years beginning on or after january 1, 2025, the connecticut income tax rate on the first $10,000 and $20,000 of connecticut income earned by single filers.