National Examination Board (NEB) has been published the results of the Grade 12 Examination on Monday 1, Feb 2021. The Grade 12 (XII) exam was held from Mangsir 9 - 16, 2077 (November 24 to December 01, 2020) all over Nepal. 
Grade 12 examination was previously scheduled to be held on Baisakh 2077BS but was postponed because of the COVID-19 pandemic.
Due to the COVID-19, National Examination Board (NEB) conducted the written examinations of 40 marks, and the remaining percentage was evaluated based on the entire marks acquired by a student in Grade 11 and internal evaluation. about 431,000 students participated in the examination, held across 4,105 examination centers all over Nepal.
How to Check Grade 12 Result with mark sheet?
1, NEB Grade 12 Result 2077 (Link1)
2, NEB Grade 12 Result 2077 (Link2) 