I am 25 years old (March 1996). Belong to the General category. I’ve passed my 10 board in 2011 at 84% and my 12th board in 2020 at 68% .
Just want to know if I am eligible for JEE advanced 2021?
Age criteria wise and 12 passing percentage.
And if not, Can I give Jee mains 2021 so that I can seek admission into my state NIT?
Will my 12th passing percentage be any problem for admission in my state NIT?
To be eligible for JEE Advanced 2021, candidates (General) should have been born on or after October 1, 1996. Sorry, you just missed by a few months. 12th percentage would not have been an issue, since due to pandemic, 75% criteria in class 12 for JEE has been removed.
Yes, you can give JEE Main 2021 as there is no age limit for JEE Main. Again, 12th passing percentage is not a problem for JEE Main and admission in NITs.
Hope it helps.
Thank you for your response, really grateful for your help 
. I’ll be aiming for NITs now.