I am not a citizen of US. I came here as a student and am currently on OPT. Planning to sell some of my company stocks and am being asked to fill a tax form. Which one is the correct one in my case? W9 or W-8BEN? PS: I have been in US for 6 years now and stayed in country for more than 183 days each calender year (except 2017 when I did a 6 month internship outside the country)
A good tax accountant is a couple hundred bucks.