Hello Aakash Saini. Thanks for contacting Careers360 and we hope we will be able to answer your query. 

Now note that you cannot correct your JEE Mains application form now. Too late. There are two cases:

• If the year of passing is 2017, then you have only one attempt remaining. 
• If it is 2016, then this is the last attempt.

Anyways, if you perform very well, when you go for counselling, there will be a problem due to discrepancies between the JEE Mains admit card and your class 12 Board exam marksheet.

Hope this helps you and all the best!