Retirement tax questions

Look on her CT tax return - Line 45 and/or 48b.   You should see a subtraction on that line.   If you already filed and it is not there, you can file an amendment; you can go back 3 years to amend past returns.  

When you click through the CT state return, you will come to the following screen that asks about Teacher Retirement Income.   See the note on the screen.   Depending on her income, TurboTax will subtract the income automatically.      @allyra60