Hello Aspirant,

Unfortunately now you cannot change your category to EWS category because you have already applied for JEE-Main 2021 under General category and the correction window is also closed for JEE-Main 2021 so now you have to take all the further steps through General category only because in JOSAA application process also you won't get an option to change your category so now only your CRL rank will be considered for admission along with General category

Now to bind-up your preparation of JEE-Main 2021 kindly check out the link given below :-

https://learn.careers360.com/jee-main-rank-booster/?icn=jee-rank-booster&ici=c360-Exam-View-WEB-Sticky

I hope this information helps you.

Good Luck!!