Greetings!
No it is not possible to refill or edit the application once you have made your payment through the online mode. Refilling is not possible because you have used an identification information in your form. But don't worry, because most of the times the mistakes go unnoticed (except the necessary details like marks, name, age, date of birth, etc). If you think the mistake was a big one, then you may write an application to them through email and send them, requesting them to overlook the wrong information and consider the correct one provided in the mail.
I hope this helped you solve your query.
Good Luck!

Hello Applicant,

Yes, you can refill your Delhi University registration form. Make sure to register with another email-id so that there is no clash between the previous form you have filled. 

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