Hello Aspirant,
The admissions to Delhi University postgraduate courses are accomplished with the aid of an entrance test known as DUET for aspirants not from DU, whereas for aspirants from Delhi University entries are accomplished through the last qualifying exam marks. For non-DU students, an entrance exam option is available and for DU aspirants merit option is available. You can't alter/revise details after the submission of the application form.
However, you can begin a new registration by enrolling again with a new registration ID and Password. This time you have to fill up the form and fill in all the personal details, document uploading and other things again. You also have to pay the fees again. The last date for registration is June 10.
Regards.
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