Hello student I'm sorry to inform you but University of Delhi has closed the facility of edit details in DU2020 application form on 5 October, so you're not allowed to upload your Marksheet.

I request you to please help me with the course/application you're concerned about so that I can check and help you more.

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

Feel free to comment if you've any doubt

Good luck