You need to be the main club administrator to update your team name. To do this:
- Login to your admin dashbaord
- Go to 'Club & Team Details'
- Select the team in question from the dropdown menu
- Change the 'Name of team' field to the name you wish to be displayed in the league table
- The 'Menu name' field sets the name of this team as it appears in any website menus (limited to 20 characters)