Top Computer Science and Engineering colleges in Tamil Nadu are provided below-

VIT Vellore - Vellore Institute of Technology

SRM University Chennai - SRM Institute of Science and Technology

PSG Tech Coimbatore - PSG College of Technology

IIT Madras - Indian Institute of Technology

Sathyabama University - Sathyabama Institute of Science and Technology

Kumaraguru College of Technology, Coimbatore

GCT Coimbatore - Government College of Technology

NIT Trichy - National Institute of Technology Tiruchirappalli

BIT Sathy - Bannari Amman Institute of Technology

Amrita School of Engineering, Coimbatore

College of Engineering, Guindy

VIT Chennai - Vellore Institute of Technology

MIT Chennai - Madras Institute of Technology

HITS Chennai - Hindustan Institute of Technology and Science

For more colleges consider the link provided below:

https://engineering.careers360.com/colleges/list-of-computer-science-engineering-colleges-in-tamil-nadu

For more information regarding BTech in Computer Science & Engineering consider the link below:

https://engineering.careers360.com/colleges/list-of-computer-science-engineering-colleges-in-tamil-nadu

I hope this helps. Wish you a great eve!