The first thing you need to do is decide if you want a big refund of your own money back, or do you want to take it home and spend it now. Which is more useful to you? With a modicum of planning and restraint you can put the money in the bank and collect interest on it. This will give you more money next year if you just hang on to it. Remember, the government is happy to take your money now and give it back to you later with no interest.
We need to make basic financial management a required course for high school graduation. Also a simpler tax code.