Hello,
If you want to take admission in IIT for M.Sc then you can apply for IIT JAM exam. IIT JAM 2019 will be conducted on February 10, 2019. It is the entrance exam for admission to the post graduates programmes. IIT JAM registration has been started. Go through the link below for details-

https://university.careers360.com/articles/jam?qt-join_us_and_login=2

If you want to apply for any other University/college then let me know.
Good Luck!