Error on charitable contributions on line 12b when itemizing deductions

I am using TTax Deluxe on a Windows 10 PC.  I am itemizing deductions even though the standard deduction amount is a slightly higher amount because it is beneficial for me to do so when taking into account my Virginia and Maryland non-resident returns.  I have checked the appropriate box on Part VI of the Information Worksheet to itemize even if the amount is less than the standard deduction.

 

The problem is that when I do the final review, a $300 amount pops up on line 12b of the 1040/1040SR worksheet as if I were taking the standard deduction. When I remove the $300 and rerun the error check the same error returns every time. 

 

With this error I can not file my taxes.  What is the solution to this?