Hello,

In order to pursue polytechnic course, you have to appear for polytechnic exam conducted by Tamil Nadu in you case as specifically asked for Sugana Polytechnic College. Exam for this year is over and the results are already out. So, you may try for next year.

Also, there's no upper age limit as such to polytechnic/diploma courses, one needs to have passed class 10 from a recognized board.

You may consider going through the following article for more details regarding this matter-

https://engineering.careers360.com/articles/tamilnadu-polytechnic-admission

And, if you're interested in knowing more about the fee stucture and disciplines available in Sugana Polytechnic College, consider going through the following link-

https://www.careers360.com/colleges/suguna-polytechnic-college-coimbatore