PO from Request Error - VAT1 Mandatory Field

Hi!  I am testing out some replenishment transactions and am working with a newly entered product.  

From replenishment, I am able to create the PO Requisition, but when trying to create the Purchase Order off of it, I get the error VAT1 Mandatory Field.

The Product has a Tax Level of "EX0" for Exempt.  The Supplier has a Tax Rule of "NTX" for No Tax.  

I'm thinking something is missing or incorrect in the Product record, but I'm not sure where else to look.

Thanks in advance for your assistance.

Kathy