Sometimes our shipping department needs to ship items that are not included in a sales order. For example a screwdriver or other tools to help customer install their product. They need to add these extra parts into a packing slip (Customer Shipment Entry) but it seems impossible to do so unless you have that line in the sales order.
Is there any way to achieve this without having to add these parts in a sales order?
Not to my knowledge. You can add miscellaneous charges that aren’t part of the SO. But don’t think you can add a line that’s not coming from a inventory or a job. For a custom shipment you have to use Misc. Shipment Entry.