I had a similar issue. If you find the problem in the Review area, go to the Search window in the upper right corner, type in the form giving the problem, then click on "Jump to form" in the next pop-up box. Go to the original form and be sure to backspace several times in each blank box, or delete any "0" entries. It will take a few steps, but does work. This is what a TurboTax tech lead me through a few minutes ago when I had a similar problem.