How do I find out who my supervisor is?

Call the warehouse and ask them. AP will know.

Usually it's the person who tells you your duties and you report to if something happens. You shluld have met your supervisor the first day you started working, after orientation. But quickest and easiest way would be to ask HR, they can usually answer most questions you might. Good luck :)

Ask one of your TA'S or the manager depends on what shift your currently on

Ask someone at the fulfillment center

Ask HR

I will suggest that you ask another manager