Hiiiii 

The correction window will start from 8th january and then you will have to login to your account and make the correction during the stipulated time only. You will be able to make correction in uploaded images, qualification details and personel details. No correction can be made after the stipulated time provided.
You can use help portal available in your account for more by logging in to the account. 

Hope this helps.

Thanks!

AIIMS, New Delhi will open the facility to modify the incorrect details in the Basic Registration process on January, 8, 2019. All the details filled in the Basic Registration of AIIMS MBBS 2019 application form can be changed except for the Name, Date of birth, Category, OPH status, Mobile Number and Email ID. 

You can also refer the below given article.

https://medicine.careers360.com/articles/aiims-mbbs-application-form

Good Luck!