Tax is not being calculated on the POs from the supplier

Hello Oracle Experts!,

The business wants the tax on POs to be calculated based on the tax configured for the supplier.

So, I modified the order in the task Manage Party Tax Profile:

And I set up the tax at the supplier profile level and at the address level.

What I got was the following:

1. When the PO is created manually (without PR) -> tax calculates OK.
2. 
   When the PO is created from a PR and an BPA exists -> tax calculates OK.
3. 
   When the PO is created from a PR and NO BPA exists -> tax does NOT calculate