儿子刚上大学，因为我们没有绿卡，所以算国际学生。儿子的高中请儿子帮了几次忙，让儿子填了W9表，给了他几百元，不知道这算不算打工，合法吗？
-Yes. F-1 student is allowed to work on campus. But your child can not work at the high school after he entered the college. Of coursew he can work at the college he attends.
如果合法，需要报税吗？
-Yes, report it in tax return, but the amount is too small, so the tax may be zero.
