To import invoices with PO numbers into QBO, you generally need a third-party app (like Autymate, ShipRush) for bulk CSV/Excel imports as QBO doesn't natively support direct PO import, but you must first set up a "P.O. Number" custom field in QBO settings (Gear > Account and Settings > Sales > Sales Form Content) to map your data correctly during import. For single invoices, you manua... https://qbcloudhostingsolutions.tawk.help/