If you joined the group and were accepted into the Uprising you need to add the clan tag. To do this go back to main Uprising clan page (you can not do this from the app.) and at the same place you requested to join there is a new tab that says interact. Click it. Then you will see a selection that says make this your XBOX clan. Click it. The request will be sent to one of our many mods. Now you will get a cool new in game tag so that you can represent while pushing back the darkness or pwn'ing people in the crucible and when whole fire team has the clan tag there are achievments that are given.