Changing value back to 600 at the error window and then skipping 2nd check worked. I was able to e-file while maintaining the 600 value on the fed 1040. I would advise that you read your state tax form instructions to be sure you're not required to adjust for the 600 deduction if you take this route. My state didn't mention it, unlike last year where the 300 contribution had to be added back on state return.
It takes me an hour to enter all my charitable contributions. No way I'm going to delete it. I rechecked manually form by form and line by line. All looks good.. Shame TT has to have issues every year with wild suggested fixes. Good luck guys.
