As per Amazon's policy, you can update 5% or 6 units of an item from a shipment. You can either add this quality or remove this quantity as required.
Please Note: You can not remove the item completely from a shipment.
Follow the steps below to update the Quantity of an item in a shipment.
Select the shipment from where the item quantity needs to be updated.
Unpack the MSKU for which the quantity need to be updated by 5% or 6 units max.
Go to "View Unpacked items" at the bottom of the page.
Click the edit icon next to the "Unpacked Quantity" for the item.
Update the Quantity by 5% or 6 units.
