Dear student,

First of all you must mention your category that from which category you have secured 1lakh rank.
Assuming that you have secured 100000 rank in category in jee mains 2020 from general category, then it's impossible to get cse branch any nits or iiits .
But If you belong to home state quota then you can easily get some nits like, nit sikkim cse branch, nit Meghalaya cse branch, nit mizoram cse branch, nit manipur cse Branch , etc.
But you can not get good and top nits like nit Jamshedpur, nit trichy, nit warangal, nit durgapur, etc, even from your home state quota.

And if you are an other state student, then there is no chance for you to get any branch (including cse) in any nit or iiit.

But still you can try your luck at josaa and csab counseling.

Also check out our jee mains college predictor tool to get an appropriate idea of colleges that you can get on basis of your jee mains rank :-
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer