Hello student I'm sorry to inform you but no you can't change any details not only after admit card or result released but when correction window closed. The last chance to correct any details in the application Form is through correction window once correction window gets closed you can't change any details so make sure you edit all the incorrect information in application Form before the Last date. This year the correction window gets closed on 20th July 2020.

For more details refer to the link mentioned below - https://news.careers360.com/neet-2020-application-correction-window-extended-again-ntaneetnicin/amp

Feel free to comment if you've any doubt

Good luck