Hello Prudhvirajteki,

Yes, you can change your email id in the application form. CBSE allows you to make changes in the application form details after submittiong the form by online mode. No offline mode such as posts, etc are allowed. You can go to the official website and from there you can edit the details of the application form. For more information follow the below link:

Https://engineering.careers360.com/articles/jee-main-application-form