Hi,

At first, you will have to appear in JEE Mains examination and if you can qualify mains then you will get a chance to appear in JEE advance and then if you will qualify advance, you will get chance to get admission in IITs.
You can get admission in NITs,IIITs and GFTIs based on JEE mains marks.
But remender one thing, whether its NITs,IIITs,GFTIs that you will be getting through mains or IITs that you will be getting through advance.

Dear candidate, at 90 percentile your AIR(General rank) will be around 102300-115000. Your OBC rank will be around 30000. There are very tough chances of your admission in any NIT/IIIT/GFTI unless you have home state quota.

Check NIT cutoffs here:

https://engineering.careers360.com/articles/jee-main-cutoff-for-top-nits

Check IIIT cutoffs here:

https://engineering.careers360.com/articles/jee-main-cutoff-for-top-iiits JEE Mains college predictor link - https://engineering.careers360.com/jee-main-college-predictor?utm_source=qna&utm_medium=jee_cp

All the best !