I don't think IITs allow you to take the JEE more than 1 year after you took your 12th exam. Since, you are already in the second year of college, DON'T make this mistake, because you cannot appear for JEE. You can try for M.Tech/M.Sc. if you really want to go to IIT.
I like to blog about various topics ranging from education in IITs to social issues in India and US. All opinions and views presented here are my own and not of my employer.