Standard Inclusive Handling Tax in Purchasing Moudle

Hi Experts,

Could anyone show me the reference documents describe the inclusive tax in Purchasing ?

I only read the document ID 1365817.1 which describe the way to setup inclusive tax in Payables.

I try to follow this documents to configure the system and create the inclusive tax successfully in AP module,but not in Purchasing.

This lead to the failure of calculating inclusive tax in AP when I try to match the supplier invoice to the receipts transaction in PO.

Please advice.

Thanks for your kindly assistance.