Hi All
When creating a prepayment invoice with zero VAT as below an error pops up:

he Prepayment account is assigned to a VAT product posting group where the VAT percentage is not equal to zero. This can cause posting errors when invoices have mixed VAT lines. To avoid errors, set the VAT percentage to zero for the account.
As the error says I can change the prepayment GL account VAT group to zero but then when I have a prepayment invoice WITH VAT it doesn't work. So the question is , is there a system to setup prepayments so both with and without VAT work? This EU localisation