Once you’ve approved an Amazon FBA shipment plan, you are only allowed to change the quantity of each Amazon SKU item by up to 5%, or six units. You can change the quantity up or down by this amount without being charged an additional fee, but you can’t add any additional Amazon SKU numbers to the same shipment plan.
If you want to add more than 5% or six units, or add additional Amazon SKUs, you’ll have to create a new shipment or duplicate the existing shipment.
If you have any more questions about changing the quantities included on an Amazon shipment plan you’ve already generated, you may be able to find the answers in Amazon’s help center information on preparing shipments. If you can’t find the answers you are looking for, let us know and we’ll do our best to help.