I have completed my taxes using an online software program. After entering all of my information, the system is showing that I owe the IRS nearly $1800. How did this happen? Every year, I've always received a refund. It has nothing to do with any previous returns or errors, as those were always prepared correctly and truthfully, However, my income increased last year about $8000, due to a part-time job. I can understand a smaller refund, or none at all, but to pay! I am burdened in debt with maxed out credit cards and don't know what to do. Did the tax codes change or something? Could this be an error? I cannot afford to pay a tax professional as I have no discretionary income. Please help!!!