Does anyone have 5/3 Bank's FEIN for reporting interest? I called customer service, but they didn't know. Can't move on without it.

They didn't send you a 1099-INT?  You might be able to pull it from the bank's website (or get the FEIN there).

They didn't send me one because my earned interest was under $10. I was able to find the number in a reddit post, of all places.