@saurabhshruti Saurabhji, Namaste
(a) your friend has already submitted/sent the payment to Austin, TX -- the ship has sailed. If it goes to wrong address, there is no monetary impact -- just processing delay , possibly.
(b) IRS site says use Charlotte , NC for "International filing" --- 1040-NR etc. for filers that are not residing in the USA. Your friend ( filer) is F-1 and residing/ (tax home ) in USA.
Is there more I can do for you ?
Namaste ji