Dear Aspirant,

See generally CSE branch of all NITs, IIITs have high cutoff

Some of the previous year(2020) closing ranks  for general category of top NITs are:

NIT Surathkal : 3115 (Home State),  1324  (Other state)

NIT WARANGAL : 2043 (Home state), 1541 (Other state)

NIT TRICHY: 4728 (Home State), 781 (Other State)

NIT Nagpur : 5967 (home state), 4708 (Other State)

You can check all the official cutoffs (closing ranks )  of all NITs , IIITs for previous year on Official JOSAA website : https://josaa.nic.in/Result/Result/currentorcr.aspx

So basically to secure CSE seat at top NITs  one should have a rank ranking between (for general category) under 5000.

Check this -

https://engineering.careers360.com/articles/jee-main-marks-vs-percentile

According to this above analysis one should have score of 170+ in JEE mains to get a rank under 5000.

For IIITs score would be low, but still a score of 130+ would help for CSE .

So accordingly  you can check for all the institutes  CSE branch  cutoffs , and marks/percentile to achieve that rank in above link.

Hope this helps.