To add a returning team to a current event you will need to do the following:
  1. Find the previous team name, and the captain.
  2. Look up the Captain in the current event (must be registered)
  3. Change from "Registered as an individual" to "Change Team Membership"
  4. In the upper right, select "Make this person a Captain of a new team"
  5. Name the team the same as in previous events.
  6. Go to the Team Tab and find the new team
  7. Manage the team
  8. Step 4: search for previous team association
  9. Find the team and associate it to previous events via name lookup.

This will then associate the team with the previous event(s) as well!