Hello aspirant, hope you are doing good.

So for the year 2020, the minimum marks to qualify JEE Advanced for OBC category is 9 marks atleast in each subject, and an aggregate of 31.5 marks in total. Only if you qualify in this way, you will be able to get an IIT college.

If you want to know about all the colleges that you can get into with your JEE Mains , you can get it here:

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Hope this helps you. Good luck!