If you pay more than the minimum amount due each month, the total amount you pay over time in interest will be reduced. Anything above the due amount, will go to the principal balance.
Additionally, there's no penalty for prepayment! To make changes to your payment and billing information, please reach out to your loan servicer — for loans funded BEFORE 10/16/23, the servicer is University Accounting Service (UAS), and for loans funded ON or AFTER 10/16/23, the servicer is Launch.