F1 visa dropbox

USA F1, F2 Visas - CPT - OPT
1

I held F1 visa from 2014 - 2018. I did not completed my studies and returned to my country in 2016. This year I have applied for the another university program and offered admission. Can I avail the drop box option?

2

Yes you can.

https://travel.state.gov/content/travel/en/News/visas-news/important-announcement-on-waivers-of-the-interview-requirement-for-certain-nonimmigrant-visas.html