Two different tax classification on a PO

Is there a way we can have two different tax classification codes on a PO?

When we create a requisition with two different lines.

Line A has a tax of 7%

Line B has a tax of 8% (selecting from the LOV dropdown)

We submit the RX and it gets processed to a PO. The PO does not have the same tax classification. it is defaulting to the defaulted tax rate we have set. It is not following the same RX taxes