Once you have printed out your labels and your packages are ready for pickup by your courier, select your shipments then click Dispatch:

Your shipments will disappear and move to the Tracking section, and a new browser tab will open with a manifest of what you dispatched:

Depending on your business process, you may file these away, use them with your courier or ignore this screen and close it. This can be printed again from the Carrier section if you need them.