Hi Praneet,

You can edit the JEE Main application details, photograph, signature till the time of payment. Once payment is made and submitted, you cannot make any changes in your application form. However, CBSE gives one correction window but the date of the same is not yet released. If it will happen this year, it will in somewhere in January. I would suggest you to keep checking the JEE Main official website to keep a track on all important dates.

Thanks,