To cancel PO deliver remainder, refer the following steps;
Create a new PO with quantity 10
Post the packing slip with 8 quantity
To cancel the deliver remainder of 2 quantity, navigate to menu button General -> Line quantity -> Update Line -> Deliver remainder
In the deliver remainder form, you can mention the quantity which to be cancelled. In our case we assume 2. Click on ‘Cancel quantity’ button,
To confirm if pending quantity is successfully cancelled, navigate back to ‘Line quantity’ menu button and check ‘Deliver Remainder’ field;
Deliver remainder field is blank i.e. no quantity is pending to deliver.
There is another way also to cancel deliver remainder. Refer the following post for the same;