Had the same issue. Entering $0 in the charitable contributions box kept bringing me back to the form for a review. I don't know if it's because the bug has been finally fixed or I just got lucky but I clicked on FEDERAL in the left menu within TurboTax and clicked on CREDITS AND TAX BREAKS again. I went through the questions without changing any information I had already filled and kept to the standard deduction option. (Just make sure to select the appropriate numbers in the list that finally leads you to the standard deduction option). Once everything was filled, I kept hitting the CONTINUE button even when it asked me to review and finally gave me the E-CHECK sign. I hope this helps.
