THIS IS WHAT FINALLY WORKED: Copied from another user (a couple of years ago):
This finally worked!! Thanks so much! If you have an on-line version of Turbotax, you can't see lines so you have to go to the section "Other Tax Credits" then "Non-Refundable Credits". After you get to that section, make sure those boxes are blank! I had zeros in both boxes.
Hope this helps everyone!
PS: never enter zeros again for blank.
