Hi gopikaraman e!!

Actually you have scored a very marks in your Tamil Nadu board exam.
So like you've said you wanna join CSE in Tamil Nadu. the best colleges you can try are:
Vellore institute of technology(VIT)
SASTRA university
Coimbatore institute of technology
Amrita vishwa Vidhyapeetam Coimbatore campus
P.S.G institute of technology
Vinayaka missions university
SRM engineering college

Choice is yours

ALL THE BEST!!!

Hello.
Following are the colleges you can look out for your admission in. All these are in Chennai itself

Saveetha School of Engineering - [SSE]

VELS University, Chennai
Easwari Engineering College - [EEC]

Panimalar Engineering College

Government College of Engineering - [GCE]

College of Engineering, Anna University - [CEG]