Once your advisor / team captains have put the rosters together on the club page they can register the teams here.
Students must have an active membership before being placed on a roster.
1. Select "Competitions" in the top right, by your profile picture.
2. Then find the tournament you have made a roster for.
3. Then select your roster in the drop-down and click "REGISTER ROSTER"
If your roster does not show up here, that means you have made a roster for the wrong game. Go back and edit your roster with the correct game title.