Teachers Federal Credit Union 1 W Main St, Smithtown, NY11787 Teachers Federal Credit Union is conveniently located on Main Street in the heart of Smithtown. It offers convenient…More banking hours, a drive-up teller and ATM in a small building located adjacent to the bank. No longer just for teachers, TFCU offers checking and savings accounts for individuals and businesses. It often has higher interests rates on its money markets and CD's than banks typically do, and the friendly staff is always available to assist you in anyway needed. Please note that the drive-thru teller window is open only on Fridays and Saturdays.