This article describes the settings to be able to sell VAT free in the back office. To actvate VAT Free delivery in the POS, see article VAT Free delivery - POS settings.
-> Start -> Customers -> Debtor maintenance
Select the specific debtor and click on the symbol "Edit".
VAT debtor: Uncheck this box.
VAT number: Enter the VAT number.
When this debtor will now be used in the back office, the delivery will be VAT free.