My first shipment to Amazon FBA

I am about to create my first shipment to Amazon FBA USA. i am shipping by UPS from Canada to the USA. I have one shipping box containing 20 identical products inside. Do I need to print and stick a FNSKU label onr every product in the box, or do I just past one FNSKU label on the outside of the box.? I know this a very elementary question, but I am not 100% certain what to do, and would like to be sure I am doing this correctly my first time out…….

Also, could someone confirm if this looks correct – I am pasting one UPS shipping label on the shipping box, as well as one Amazon Box contents label on the shipping box. Total labels on the outside of the shipping box would 3 labels including the FNSKU label.

Any comments or suggestions would be very highly appreciated. Thank you