Hello Ankita. For getting into Harvard Buisness School, the first step is to appear for GMAT. After that you have to register yourself in their portal and create your application. The application requires your statement of purpose, transcript, GMAT score, IELTS/TOEFL score, recommendation letter and work experience certificate. HBS will scrutinize your application and then call you for interview via skype or other means. It is during the application phase where you can apply for scholarship at HBS. 

Moreover, there are several firms in India who offer scholarships to students who get admit in the top b-schools of the world.

Hope this helps.

All the best.