Hi,

For MBA, the first essential step is to complete you Bachelor's degree in any discipline and must have scored at least 50% marks in graduation.

Since, you have just completed 12th or will be completing it soon, then first, you will to go for a Bachelor's degree based on your stream. It can be B.Tech, BSc. if you are a science student, B.Com, BBA, etc. Next, after finishing your graduation or in the final year, you will have to apply for the entrance exams which are conducted for admissions in MBA, these can be conducted by respective universities, colleges and on a national level too.

Here is a list of entrance exams that are conducted for admissions in MBA:

For more details regarding MBA course, you can refer to this link: https://www.careers360.com/courses/mba-master-of-business-administration

I hope this helped you.