The memo/description column in the VAT detail report will only display the transaction's memo field. You'll want to pull up two reports the product/service list and VAT detail report. Then, export them to Excel and filter them manually. Let me walk you through how.
Go to Reports, then Product/Service List.
Click Customize, then mark the boxes next to Tax Amount and VAT Code.
VAT detail report - how do I include transaction descriptions? Otherwise it's just a list of meaningless numbers.
I know this is not your fault, but what good is a report without any descriptions - this is pretty basic stuff. It shouldn't need a manual fix each time, for a basic requirement that all other systems seem to provide. QB fails on so many counts compared to the competition.