I am having the exact same error. I also chose to itemize rather than taking the standard deduction due to the state tax impact. I get the same error where TT puts the amount of $600 in line 12b of the 1040 worksheet which is for charitable contributions only if you take the standard deduction. It should leave that blank if you choose to itemize since all charitable contributions are already counted when you itemize. TT realizes it should be blank and flags it as an error. I remove it as you describe but then when you run the review it puts the $600 back into line 12b and the error returns. I have tried checking the box forcing itemized deductions but no change. Sorry no solution but you are not the only one having this problem.
