NIE in case of dropbox

Hi,

I am in India and am eligible for Dropbox appointment for h1b. Do I have to request for NIE approval before my drop box appointment or along with the my drop box submission? Also, my family who are h4 are still in US. Should I only request NIE based on family separation?

Include the NIE letter along with the other dropbox documents.

If you qualify based on the industry you work in, use that.

https://www.cisa.gov/critical-infrastructure-sectors