Since buying a gift card is in fact a payment without any products attached to it (yet) do I need to set up a gift card with a VAT-percentage (f.e. 21% in Belgium) or at 0% VAT, and will the VAT split up be done when products are actually paid with the gift card?

Some companies might be selling different products with different VAT-tariffs, so if there's a VAT-percentage set up it might not be the same as the VAT-percentages for the products that will be actually paid with the gift voucher.

Any idea how to set up this correctly for (Belgian) accounting rules?

Regards,

Luc