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Greetings!

If you want to get into IIM for your mba then first of all you need to complete your graduation and then you need to write the exam called CAT as iims provide admission in mba on the basis of CAT. Now to be eligible for CAT exam you must have done your bachelors degree with at least 50% marks (for general category) and 45 percent marks (for SC, ST and PWD category) or equivalent CGPA for recognized university.IIMs will shortlist candidates for final admission round on the basis of CAT 2019 score and on other parameters such as past academic qualification, diversity, work experience etc. After  CAT   candidates are shortlisted by all the IIMs and then they conduct written ability test (WAT) and personal interview (PI) round and then on the basis of all these you will be finally selected for admission.  For detailed information go through our page for which link is provided below :-
https://bschool.careers360.com/articles/iim-admission-criteria
Thankyou