Hello student NID application correction window shall open from 12th February 2021 and shall remain open till 15th February 2021. You can edit your application Form and make the necessary changes through correction window.

For more details refer to the link mentioned below - https://www.google.com/amp/s/design.careers360.com/articles/nid-dat-application-form/amp

Feel free to comment if you've any doubt

Good luck