Oracle eBTax – do purchasing categories drive tax in eb tax

You can definitely use Purchasing categories to drive your tax in the form of tax rules that use the determining factor of ‘Product – Inventory Linked’

First you need to establish a Product Classification for the Purchasing Categories. Do this by going to;
tax manager–>products–>product classification

then create a new value where you link the ‘Inventory Category Set’ of ‘Purchasing Category’ to your own names ‘Fiscal Classification Type Code’. One you have done this, you can use your newly created Purchasing Category product classification where the determining factor class of ‘Product – Inventory Linked’ (no Class Qualifier) and the determining factor name is the value you just created.