The Costume’s Tag #/ID can be changed if you sew the wrong tag into a costume or have made some change to the collection. Click on the “#” button next to the Tag ID field. You will get a box that allows you to see the current Tag#/ID and give you a place to enter a different one. If the one you enter has already been used you will see a message saying that ID is “Not Available” and you can enter in a different one. See the screen below.