I am in the "this is a bug" camp.
I've gone through the steps of outlined in many of the responses below. It is like waving chicken bones over the computer in a voodoo ritual. First time in years Turbotax does not give me confidence.
In my case, Turbotax waffles between standard deduction and itemized deduction, because the potential of the $300 charitable gift donation on top of the standard deduction would be more than itemizing. But it won't take me through the interview to put the $300 down on the 1040 on line 10b, no matter what I do.
My workaround: enter the value manually, print out the 1040, and review for accuracy.
