Hey Abhishek.

IIM Indore conducts an entrance test- IPMAT for admission in 5 year integrated Management programme directly after Class 12th. The application process for the same is tentatively scheduled to start in the 2nd week of March and will continue till the 3rd week of April. So you can apply for it when it starts.

The eligibility criteria for IPMAT is that you need to score a minimum  aggregate of 60% marks atleast in your 12th boards. The age limit for it is 20 years.

Best of luck