You have nothing to worry about it. As you have selected the result awaiting option then you should wait for some time and IISER will release notification for the update of marks in the portal. You will have to update the marks at that time online. So you should keep an eye on the official website.

To know more about IISER Aptitude Test visit the link below:

https://engineering.careers360.com/exams/iiser-aptitude-test

I hope this answer helps. All the very best for your future endeavors!