Why Can’t I Edit a Sales Order After an Invoice Has Been Created from It?

Once an invoice is created from a sales order, the sales order is automatically locked and cannot be edited. This is because the invoice has become an official financial document linked to the sales order, and any edits to the order after that point would cause a data conflict between the order and the issued invoice.

If you need to modify the sales data after the invoice has been issued, the available options are:

• Issue a credit note to adjust the invoice value.
• Cancel the current invoice if possible, then edit the sales order and convert it again.

Make sure to review all sales order data carefully before converting it to an invoice, as it will not be possible to edit it afterward.