Hello student,
62 percentile is a low one to get seat in nit or iiit colleges. You have not mentioned any reservations or category. But irrespective of the reservation or any quota like home state quota, you will not be getting any nits or iiits.
I suggest you to apply for state colleges or any other private institutions. There are pretty many good private institutions where you can apply, write the entrance test and get through.
Here are few good private institutions
1. Ssn college in chennai
2. Amrita institution in coimbatore
3. Psg college of engineering in coimbatore
4, cbit college in Hyderabad
5. Vasavi college
6. Sastra deemed to be a university in thanjavur
You can check your colleges using the link below
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile