Should I fill MIT, Manipal form?
This is up to you whether you have interest in it or it is convenient to you or not but as per my view you should apply for it as this is also a very good college to pursue B.Tech program but the only drawback is its high fee so if you are okay with it then you should go ahead.
Also, the application window is open till 11th-Mar-2018 so you can apply and to check the complete information about it application process you can go through the below link -
https://engineering.careers360.com/articles/mu-oet-application-form
Good Luck!!!