For a taxable item - any option to default/not default-tax category based on Supplier Selectionti

We have requirement as follow for operations in Kenya.

For a Taxable item is there any option available for Tax Category to default / not default based on the selection of supplier during purchase order creation.

In kenya during purchase order creation, for a taxable item, when ordering to one supplier is item is applicable for Tax, the same when order to a different supplier the item is not applicable for Tax.

With our present configuration while preparing the purchase order - Tax Category Defaults, but for non taxable supplier we are unable to remove the tax Category in the purchase order.