You are 100% correct. This will get you past the error but an item does not equal cash. In the end, yoru numbers should be correct but the type of contribution is wrong. You may want to wait until TT fixes the bug through an update since cash is causing the issue. I opted to make the change below and double check manually...
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. Good luck guys.
