Add a line not on the order

Where: Document details → line table

1. Open the document.
2. Click + to add a new line.
3. Enter the quantity and unit price for the extra charge.
4. Select the appropriate debit account (for example, the freight account).
5. Click Save.

The new line is posted to your ERP as a finance entry. It does not update the purchase order.

Related: Create a new item from a document line