A visa for Nepal can be obtained on arrival at the Tribhuvan International Airport, Kathmandu and at border entry points in Kakadvitta, Birgunj, Bhairahawa, Nepalgunj, Gaddachowki on the Nepal-India border and Kodari on the Nepal-China border.
Outside of Nepal, A visa can also be obtained at the nearest Nepal Embassy or Diplomatic Mission.
To renew a Visa you can go to the Department of Immigration, Kalikasthan, Kathmandu.