Hello Aspirant,

For this year Bihar board has not released the top 20 percentile yet because it is released after the declaration of results of class 12th and till now the results are no out yet so we have to wait for it. Also for this academic year means in JEE-Main 2021 the 75% criteria or top 20 percentile rule has been waived off due to the enormous spread of Corona virus. So even if you don't lie in top 20 percentile of Bihar board results or if you won't be able to secure 75% then also you will able to get admission to NITs/IIITs/CFTIs and also you can appear for JEE-Advance if you qualify the JEE-Main, provided that you passed all the subjects of class 12th.

As of now JEE-Main 2021 is postponed till any further notice and till now only February and March attempt were conducted and April and May attempt is yet to be conducted so when the situations will get normal the exam will take place.

You can also take JEE-Main Learning package for your preparation

https://learn.careers360.com/jee-main-coaching/?icn=JEE_Main_knockout&ici=JEE_Main_article_view_sticky

I hope this information helps you.

Good Luck!!