Turbotax getting my father's pension plan wrong - no way to fix

I'm filing my parent's taxes for them online.  Things were going ok until I got to a part where I have to put in his T4AP.  It asks for the numbers in certain boxes, but NOT the one in box 20, which is the Taxable CPP benefits.  If I do that, and hit continue, it goes to a page that now shows my father's benefits as $0.00.  Then goes on to make sure that number is the same as what's shown in box 20 on the T4AP.  Which it isn't.

 

How am I supposed to enter this information?