In the F1 helptext for Prepayment Based Invoice, we find below,
But still, we can create a Prepayment Invoice for the CO. Yet when we print the invoice report, we notice some incorrect tax calculations.
Invoice lines look like below,
So maybe we are facing this tax calculation issue due to above mentioned prerequisite, but why?
What is the idea behind above highlighted prerequisite on a functional stand point?
Best answer by Antbarrif
I think the help text refers to the fact it is possible to have multiple tax codes on a single order line, for example in a sales tax environement like the US.
This functionality originates from a VAT environment (Poland) where multiple tax codes per CO line are unusual.
So while your invoice has mulitple tax codes, there is still only one for each order line (from the screen shot it looks so). Therefore it is unlikely that this line of help is the cause of whatever tax error you are having.