In D365, it is not possible to add charges to a purchase order line after a PO line has been invoiced. The charge cannot be added to any line at all, even if there are no goods received on this line. So, if one PO line has been invoiced, no charges can be added at all. Microsoft has evaluated the reported issue. The observation is correct. Actions related to the price of a purchase order line are locked down in the current design, upon any partial invoice of a line. This includes adding a charge to a PO line which is partially invoiced. This is a known design limitation relative to PO line and source document/accounting distributions. Microsoft recommend the user to edit charges on the purchase order while posting the invoice (PurchEditLines) where there is a charges action allowing for changing the charges before posting. ==> But the role of the purchaser is to make sure the PO is correct including the charges. The role of the person who is posting the invoice is to make sure the invoice is matching with the PO. And not to make a charge line if there is a difference.