I would like to be able to easily add a marker (or tag) to all my line items so that identify the items that contain UK VAT..

The tag could be used for other thinge also and should be an easy add. i have googled and can see something on Google Precision, i dont know what that is, but Prepare suits me fine and so adding bespoke TAGS would be a great feature to me (and thousands of others i beleive)