Dear student,

As you have secured 40000 rank in sc category in jee mains 2020, then it's impossible for you to get into any nits or iiits.
If you belong to home state quota then you can easily get some nits like, nit sikkim, nit Meghalaya, etc.
But you can not get good and top nits like nit Jamshedpur, nit trichy, nit warangal, nit durgapur, etc. even if you belong from home state quota.

Better try at bit sindri or at other private institutions like kalinga institute of industrial technology or cv raman global university, because in these two private colleges any low ranker can also get admission.

Also check out our jee mains college predictor tool to get an appropriate idea of colleges that you can get on basis of JEE mains rank :-

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer