Hello there, 2020conversation.
You can edit the Purchase order (PO) information on the invoice and then send it again.
To do that:
- Go to the Sales menu and then choose Invoices.
- Locate and click the Invoice transaction.
- Edit the transaction to its correct PO.
- You can also enter a message on the invoice to let your client know that you are re-issuing the invoice with its correct PO.
- Click Save and send, then, Send and close.
You can check out these article for information about sales transactions:
I'll be here if you need anything else.