SERVICE CHARGES NOT BEING ADDED AUTOMATICALLY

[MVM-WY]

WHEN I SIGNED MY BUSINESS UP A MONTH AGO, THE REP SAID WE COULD AD SERVICE CHARGES AUTOMATICALLY WHEN SOMEONE USES THE TERMINAL.  

IN THE STATE OF WYOMING IT IS LEGAL TO AD SERVICE CHARGES INTO THE FEES.

I PUT IT THE SQUARE SERVICE CHARGE PERCENTAGE INTO SQUARE AND HAVE BEEN CHECKING ON THE TRANSACTIONS COMPARED TO OUR CUSTOMERS INVOICES.  THE FEE IS NOT BEING ADDED ON AUTOMATICALLY LIKE THE REP SAID IT WOULD.

DOES ANYONE HAVE A SOLUTION FOR THIS?