Get your taxes done using TurboTax

Go back to your PA interview and "Edit" Pennsylvania and "Continue."  You should be on the summary page that says "You've finished your PA return" and shows the sections, General Info, Income and Adjustments, Taxes and Credits, etc. 

 If not you need to click through the PA interview to get to the end of the section so that you end up on the PA summary page with all the sections listed.  (see screen shot below). 

Once there on the summary page,  you will "Update" the Income and Adjustments section.  One or two pages in, you should arrive at the page "What kind of retirement income do you have from PA?" (see screenshot below).  Use the dropdown to select the appropriate category for your retirement income situation.