How to remove the intercompany AR invoice tax rate from the intercompany AP invoice?

Summary:

Currently, the tax rate in the intercompany AR invoice is applied to intercompany AP invoice by default. As per the client requirement, the intercompany AR invoice and intercompany AP invoice (within the same business unit) should have different tax rate codes i.e. tax rate codes from different tax regimes. We have defined the requried tax rules, but the tax rate from the intercompany AR invoice is applied to intercompany AP invoice as well. We are trying to remove this tax rate code, but the tax rules do not work in this case.

How to remove the intercompany AR invoice tax rate from the intercompany AP invoice?