Have opened a US account with an online brokerage to trade stocks and filled up the W8-Ben form as am a foreigner. My questions are: 1) Do we need to file any other tax forms on an annual basis and if so what forms. 2) Do we have to resubmit W8-Ben form after a certain number of years and if so how many years. Appreciate your kind advise as have tried to read up on this but am getting confused. Thank you.