Nepali Congress leader Shekhar Koirala and CPN-UML leader Lalbabu Pandit filed their candidacies from Morang-6 on Sunday.
Koirala filed the nomination from the ruling coalition.
Pandit was nominated from UML-Janata Samajbadi Party (JSP) alliance.
Both of them reached the Election Officer’s Office this afternoon and filed their candidacies.
Earlier in 2017, Pandit had lost the election to Koirala.