Tax Classification not defaulting from Supplier to Purchase Order

Summary:

We created a supplier where a default value of Tax Organization is defaulted. We are expecting that when we create a Purchase Order from the said supplier, the Tax Classification field in PO shipment line will have a default value. However, the field is blank.

How do we make Tax classification value defaulted from Supplier Profile to also be the default value during PO creation?

Content (please ensure you mask any confidential information):

We created a supplier where a default value of Tax Organization is defaulted. We are expecting that when we create a Purchase Order from the said supplier, the Tax Classification field in PO shipment line will have a default value. However, the field is blank.