Hi Somya !

The whole process after 12 to get into IIM Indore is as follows :

1. First you need to clear the IPMAT examination
2. If you clear the examination then you get interview call from IIM Indore.
3. If you clear the interview and make it through final merit list then you get your call letter from IIM Indore with instructions regarding fees submission and many other details

I hope this answer helps you.