@bikash_001

Updated***** Watch this video from 30:50 http://enepalese.com/2015/07/30706.html

I think you have enough documents to show your identity and your nationality. If you have your birth certificate on English then you should add it too. If you have any other documents that show that you are the national of Nepal. I have also attached police report that I bought when I came to US because it has my photo, but I don't think it is necessary.

Most of the people are saying that passport is enough for the evidence of your identity and nationality evidence, but I would say just send some extra documents. If you send more document USCIS not gonna say anything.

Also send the photocopy of your VISA if you have one, and when you send your passport photocopy, also send the copy of page where you signature is, and your nearest relative's name.

I hope you are filling I-821 as well.

You also need to send the evidence that you have been living in US since June 24th. I have sent some evidence (utility bill, bank statement) that I was living in US before 24th, and other document (bank transaction, cvs Bill, gas station bill) to show that I have been living in US after June 24th.

Don't forget to fill G-1145 if you want to receive E-notification of form acceptance.

Don't forget to check your form twice after you print it out, and let someone check it for you if possible.
Hope this helps.