When you open the kit, you'll see the instructions advising you to register your kit. This is a must-do because if you send your kit back without registering it will not be processed.
The instructions, include written and photos. Both are easy to follow.
Once our son, provided his saliva sample, followed the instructions, placed the sample tube into the plastic bag.
I placed the plastic bag, with sample, back into the same box. (the box has a return addressed stamped label on it)
Now we'll just wait for notifications of his results.