Hello Pulkit,

Could you please specify your question, which exam are you actually talking about. 

If it is JEE Mains, It is not possible to change your JEE credentials after submitting them to the exam center, but there are some revised rules in which they can help you if you write to them, you can request them with a valid reason to change your exam center, BEFORE THE AVAILABLiLITY OF ADMIT CARD.

But unfortunately, admit cards of all the registered students are out now, so you couldn't change them anymore. Sorry to say.

Good Luck for your exam!

I don't think u can d only thing u can't change in jee credentials after submission is d xam centre.but as d new government present scenario (they are helping people in many ways jst by posting on their twitter handle or by writing letter) u can request cbse with a valid reason for change ur xam centre before availability of admit card
Since admit cards are out you can't change them
Thank You :)