Hello,
You will apply a new application form in jee main April session. There you can give your details which can be different what you gave in January session. So yes you can change your category too.
But when you will appear jee advance the jee main session in which you have high score will be selected. So if your January session gets selected then your jee Advance form will have those details of jee main January session.
Keep in mind this point. Change it and practice very well and perform your best to score more than you get in the January month. So that April session paper will get selected.
Hope it helps you !

Greetings !!

You can change your category from general to others.Or from others to general category . You may contact jee through email or helpline numbers mentioned in jee mains mentioning your category change. Usually with 24-48 hours you will be getting the reply from the help desk. If any dooubts, pls feel free to ask.

Wish You good luck !

Thank you !!

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