Hi Gowtham,

Hope you are doing well! IIT Madras selects candidates based on their JEE advanced score and the ranks primarily. These ranks keep varying every year. Also another important factor of consideration is your category. Based on your category the closing rank would vary. The Joint Seat Allocation Authority will declare the cut offs of individual colleges and the courses in their official website.

https://josaa.nic.in/

You can also get the updates on the careers 360 link https://engineering.careers360.com/articles/jee-advanced-cutoff-for-iit-madras