Dear Afreen, you haven't mentioned the entrance examination for which you have entered incorrect details and need correction. Generally, most of the entrance examinations have correction windows. During this correction window, you can change details. But there will be a variation in the fees that you have to pay because the fees might be different for General Category and SC/ST/OBC/PWD. Visit the official website of the entrance examination that you have applied for and check the dates for the correction window. Make those changes and you are good to go! However, if you want information pertaining to any particular entrance examination, do let us know and we shall help you out. Hope this helps.