This token is of the highest importance as it is a compulsory field on any document issued by a business.
What is also missing is the "Vendor Country".
As for now we can can "hard code" it in the custom template, but please add these 2 fields in the next PP update.
I agree that this functionality should be added
As a workaround I add TAX ID as a fix string in custom invoice template, fortunately this is not change