State tax filing

Thank you.  Is there any way to determine the source or makeup of the amount that TurboTax has calculated and designated as the "Conformity Subtraction" amount?  I do not recognize the amount listed from any of my income or deduction entries, so I'm not sure whether it's from a single source or multiple sources.

 

Without knowing the source of the amount they've listed, I'm not sure how to determine the portion that should be allocated to VA.  For other amounts to be allocated, it's more clear how to determine the portion to be allocated to VA based on the state I was residing in when the income amounts were received or the deduction amounts were incurred.