Dear aspirant,

As per my understanding, I suppose that you're asking what do you have input in these two sections while filling the application form. You have to write your address (Permanent or Correspondence) in these sections so that the university knows where you're from.
To answer your second question, the OBC NCL certificate that you provide at the time of admissions should be of the current financial year. So what you can do is that you can apply for reissuance of the certificate from the concerned SDM and produce that during admissions.
For further information, you can visit the link provided below:

Microsoft Word - FAQs based on portal problem.docx (du.ac.in) (http://du.ac.in/du/uploads/25062020_FAQs.pdf)

Hope this helps!