Since I don't know what your filing status is (single, married filing joint or head of house) I can't help you too much. I would suggest that you print out your return and take it to H&R Block for a free second look. These are FREE. They will let you know if everything was done correctly or not. If there is an error you can have them fix it fix it yourself. I think TurboTax provides a similar service but I don't know much about their service.
