Display the Value of the Invoice Field on a Purchase Order

Answer

There is a way to view the value of the Invoice field on a PO as long as these prerequisite conditions are met:

1. A PO has been created and approved.

2. The PO, or at least one of the PO Lines has been received.

3. An Invoice has been created for at least one of the PO Lines and there is a cost variance between the received PO Line and the corresponding Invoice line.

4. The Invoice has been approved.

At this point, the Invoice field value can be seen by opening the PO in the Receiving module.
On the Material Receipts tab, click on the Filter hyperlink in the blue bar at the top of the Material receipts section.

In the Type field you will see the value !=INVOICE. This is the default value of this field that presents only the Material Receipt transactions that are NOT of type INVOICE, which is why we don't see the Invoice
value populated on the RECEIPT transactions being shown here.

To view the Invoice number, delete the value of !=INVOICE from the Type field.
When you expand the details you will see the Invoice number populated for this PO.