I would like to hardcode stuff in capture so invoices dont get stuck when touchless i activetad

Exempel 1
If the supplier dont have a field for Rounding when there is no rounding capture get stuck becouse it cant find the field. I would like to tell the system that if no rounding is found make rounding green. Supplier specifikt

Exempel 2
If a invoice is a credit always make amount on rows and in the header in -
Capture dont like when rows have both + and -. see attached file

I would also like more information on how you should work with capture on a more in depth way .