Neerman Ji

You do not need to file an application here in the US. Instead, your spouse needs to apply for a visa at the US Embassy in Kathmandu for the same period of H-1B authorization.

The documents required are:

1. A copy of your H-1B approval Notice
2. Latest Three Pay stubs to evidence your bona fide employment
   
3. 2007 Tax Return
   
4. Documents evidencing your non immigrant status in the US in the past (e.g. I-120 etc)
5. Marriage Certificate
6. Birth Certificate
7. A letter from your current employer verifying your employment with start dates
8. Financial Documents (Bank Statements)
9. Passports
10. A copy of your passport, I-94 and Visa
    

Good Luck and Happy Dashain