Gotwood, not knowing what state you are in, I can tell you what the Federal rule for registration is and what the TN state rule is (TN mirrors the Federal rule).
Under the Federal SAFE Act rule, your employees only have to reguster with NMLS if they both accept an application for a covered loan AND offer of negotiate terms (quote a rate, call a customer and tell them they are approved, deliver the GFE, etc). If your tellers are not doing both of those, then they do not need to be registered under the Federal rule. You still need to check your state law, as Randy pointed out Texas, at least is a 1-prong test. I'm not sure if any other states are 1-prong or not. TN is not.
You do however, have requirements under Reg Z to train them and make sure they pass a background check and credit check, but they do not need a number.
_________________________
I can't herd the cats anymore, so I just set up the electric fences and let them fry when they stray out of bounds.