When creating your entry you will first need to add the members onto your registration. You can do this on the Members and teams section by.
1.) Using the bulk entry sheet
2.) Clinking the "add member" button and following the steps.
Once the members have been added to your registration, click on the "Add Team" button, enter an appropriate team name, and click the names of the members you want to add to your team.
Then click next to continue :)