What price is the VAT you pay based on? And how do you currently do this every month?
And who pays the VAT? You or the customer?
But the idea is to set it up, so that it calculates the vat even if the “line amount” field is empty, and I know that this functionality exists in NAV. I just don’t remember which country localization I have seen it in. It allows you to calculate the vat, like you need, but show it to the customer as no price.
Maybe some of our other members know what I’m talking about? Does your local version allow you to calculate vat (or sales tax) for promotional items?