Dear Vibhavi, once you fill in the AIIMS Basic registration form, you will know of the online status of your application by Jan 16th. And then the correction window wil open between January 17th to 22nd allowing you to make necessary changes to your application form where needed. By January 25th the final status of your application will be notified. Then you can fill in the final registration form February 21st. For more information, please visit our website, https://medicine.careers360.com/articles/aiims-mbbs-application-form