Partially. This, from www.cga.ct.gov:
Connecticut's income tax excludes (1) 75% or 100% of federally taxable Social Security income, depending on the taxpayer'
s federal adjusted gross income (AGI); (2) 100% of railroad retirement benefits; and (3) 50% of federally taxable military retirement benefits. Connecticut has no exemptions for other types of pension income.
Turbo Tax will figure out which portion will be taxed.