Well how much withholding is on your W2? You can only get a refund from that. You would have to compare your return to theirs line by line and see which lines are different. A lot of things affect it. Like your filing status, are you married, do you have kids, etc.
If you only made w2 $1100 yo do not need to file a return except to get back the withholding in box 2.
