Questions tax id not attaching to customer and suppliers

The tax ID is selected through a combination of Tax Zone (linked to supplier or customer) and Tax category (linked to inventory item) for example if I sell item A to Consumers (c) and also business (b) you will need the following;

item a linked to tax category containing tax id for 10% ex and 10%inc

consumer is linked to tax zone consumer containing tax id 10%inc

business is linked to tax zone business containing tax id 10% ex

When you transact against either consumer or business for item a it knows which one of the two tax id's to use linked to it through tax category, does this make sense?