I changed mine back to 600 in the box at the top of the error window which comes up after the TT check. If you only have 1 error then it should work. I remember last year TT had a different issue and 3 errors popped up to which I was able to review each one. Fixing the 1 contribution error worked for me and also didn't require me to delete my numerous charitable contributions which carry over to the State forms. You'll want to be sure that your state tax forms don't require the 600 to be adjusted for. Last year they did because the contribution deduction was subtracted before fed AGI was calculated producing a reduced AGI. This year, fed 1040 form has the 600 contribution added to the standard deduction on line 12b which is after AGI is computed.
If you are not comfortable with skipping TT double check screen and doing a manual double check then wait for TT to issue a bug fix.
