Now it’s time to close one of the ends.
Fold the narrow tabs in, then the wide tabs that are the end of the box.
When you are done, take some packing tape and tape the tab down. I like to cut a piece as wide as the box.
Once it is down, I then take a piece that is about 6″ longer on each side and tape it again. The difference is you are going down the edges which will make it harder for the box to open.
Press the top and sides, then fold the sides in, picture box style, and then fold the top down.
Last, reinforce the adhesive glued edge with tape just in case as shown at right.