I'm not well versed in StampTV yet, but I think that if you want to make sure you have a picture uploaded and tagged properly, you would start on your page. From there, under your picture/avatar, you will find a clickable link named photos. After you are there, you will find a box in the top right hand corner that say +ADD. If you click there, you will be able to upload the photo. After you have done that, I believe it offers you a chance to provide a description and tags. You will want to make sure that you use the tag that is put forth in the challenge.