Hello student Jee main correction window is open now candidates can correct the information they want to change till 31st July 2020.

Yes you can change your educational board as information regarding the academic details of the candidates was open for editing.

For more updates refer to the link mentioned below - https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-application-form-correction/amp

Feel free to comment if you have any doubt

Good luck