Retired Connecticut teachers can deduct a percentage of their federally taxable Connecticut source teacher's pension on their CT1040 or CT1040NR tax forms. To do this, they should go to the federal 1099 screen and select "CT - Teacher's Retirement Income" from the Pension Type drop-down menu. This option will calculate the deduction and apply it on the appropriate lines of the CT1040 or CT1040NR forms.