Once you have entered any information, the correction window is the last chance to make any corrections. Post that NBE will neither entertain any requests for corrections or make the changes on its own. So what you enter there in the application form stays final once the correction window is closed. And the merit list is prepared according to those details. So, unfortunately you cannot change in All India Counselling because your details will be saved in the application form and any discrepancy will cost you your admission.