Invoices
For invoices, simply insert your purchase order number in the "PO Number" section highlighted below.
To find this invoice using Purchase Order number, navigate to the invoices page and search for PO number in the search bar.
Orders
Purchase Order numbers will be automatically created when there is not enough inventory to fulfill the order. In the case below, PO #2.
You can then search by Purchase Order number in the Orders page search bar.