when nepali student gets f1 visa, some will get1year, some will get 2,3,4,5 years(depending upon consulars mood). if you are inside US and not travelling out, then don't worry even when your visa got (remember not passport, you must renew your passport) expired bcz it is labelled as Duration of Status (DS). 1. if you are going to nepal within your visa period, no need to worry about. you need to take new I20 from your college. Contact your international advisor. 2. if you are going after visa expired, then you have to do everthing same as you did when you first applied. i don't know any nepali in this situation but i know student from china and sri lanka, they went back to their country during their school (they were not graduated yet and were at middle) and got visa denied. they had everything (like apt, car, college etc etc) here in US. Contact your Int Advisor for more suggestions. I would suggest, if your visa is expired, then don't go to nepal (until unless you need to be there) until you have H1 or GC. Good luck man.