Hi,

Once you will change your category, your overall result will be on the basis of updated category only. As you must be aware that the complete result including the result will be evaluated at the end of all the sessions, and since you will be updating the category during the May session correction window, your overall result will be updated according to that only.

For more details regarding the details that can be changed, guidelines, you can refer to this link: https://engineering.careers360.com/articles/jee-main-application-form-correction

I hope this helped you.