We are a OneWorld Account in the USA with subsidiarys in France and Spain.   We re using the International tax reporting and found an interesting issue.

If we do a Discount at the "header" level, the tax code shows up as UNDEF:ES for all transactions with a discount, yet if we enter the discount at the line level for the same amount (same discount code, overriding the pricing to "custom" to enter the correct amount), then the tax code is populated correctly to the appropriate code.

We can't submit our reports with discounts showing up in the UNDEF so are updating each invoice that has a discount to a line level discount even though it is an order discount, so our reports are correct for filing.