you are a nonresident alien for the first two calendar yeas on a nonstudent J1 visa. It does not matter, what the source of your income is. For those first two years you would need to file form 1040NR or 1040NR-EZ plus form 8843 (plus a state return, if applicable). Unless you are married to a resident alien/permanent resident/US citiyen, you have no option to be treated as resident alien (unless you violate your visa conditions). Form W8BEN applies to you. Using form W9 does not make you a resident alien and it is the wrong form.
