Dear aspirant !!

Hope you are doing great ! Yes, you can again complete your class 12th from the National Institute of Open Schooling. NIOS is a board from where you can do class 12 th even after graduation . Also you have another option that is, To improve the percentage of 12th after graduation there is only one way give the private exam of 12th class As maximum state boards offers improvement with in 2 years of period after the 12th class.

for more information about nios ,visit the link ;-

https://www.google.com/url?sa=t&source=web&rct=j&url=https://school.careers360.com/exams/nios-class-12/amp&ved=2ahUKEwjulbGFqLL4AhXa8zgGHRHqBg8QFnoECAUQAQ&usg=AOvVaw1qu8_XiZYephZEmr_-8jnq .

Hope it helps you !!

THanking you !!