The nature of your customer onboarding process may require you to have, and access, multiple teams in Flatfile.
So long as you are properly logged in (and your account has the necessary access), swapping between teams is easy. Click the “three dots” menu next to your name in the lower left. You’ll see an arrow next to the team you currently have opened. Hover your mouse over that arrow and a menu will appear showing you the teams you have available to you. Click any of those teams to swap to them.