After talking with Sage I know I am doing best practice with this. In  my vi export for invoice history I am combining the taxable amount and the non-taxable amount. I have both fields pointed to the same col/pos "7" in my case but I don't know the syntax for the condition in the expression builder to combine these fields. For my situation when the taxable amount is 0 there will be value greater than 0 in the non-taxable amount same is true for when the non-taxable amount is 0 the taxable amount will be greater than 0.

Some assistance would be very helpful.

-Tim