Item Level Tax & Purchasing Category Tax

Summary

Item Level Tax & Purchasing Category Tax

Content

Item Level Tax & Purchasing Category Tax

We have requirement:

Setup 1: Catalog items Tax should default from ITEM level

Setup 2: Non-Catalog Item tax Should default from "Purchase Category".

If I select Item belongs to particular Purchase Category Which are defined in Setup 2 and tax is duplicating in PO as both the condition gets applies. Its matches the both the conditions. One Item level tax & Purchase Category setup.

Do we have any way to control this?

Please suggest.