With our latest release of EZ Importer, you can add PO Numbers to your order and mark orders tax-exempt.
Add PO Numbers To Your Orders
There is a new field, po_number, on the Order Details tab of your data mapping. You can map this field to the column in your file with your PO Number. This field was recently added to Shopify's Order API and is currently displayed on the orders timeline (although this could change in the future). …Read more