Rules for not applicability of transaction tax for withholding tax invoices

Summary:

We have a basic requirement that transaction tax should not be applied when a supplier is undergoing transaction tax
I have done a few things but its not working as expected

for to supplier site—>COntrol and Defaults—>Transaction Tax—>Allow tax applicability uncheck

If i uncheck this both the transaction tax and withholding tax are not getting triggered.

I created a rule that if the supplier registration status unde supplier site—→Tax registration—> as not registered and then wrote a tax applicability rule with result as not applicable even then the transaction tax and withholding tax are not getting calculated.