Hi Amit, 

First, you need to understand how the top 20 percentile is calculated.

It is calculated by counting the marks in FIVE basic subjects which are-

1. Physics

2. Chemistry

3. Maths

4. English or any other language

5. Any optional subject like EVS

Marks are calculated out of 500 and then JoSSA releases a list of top 20 percentile in early July.

Last year, the cutoff of Maharashtra State Board for the general category was 343 out of 500 and for obc-ncl, it was 344.

All the best!!!