Ask your parents if they claimed you. If they did, your amended return would be held by the IRS and you and your parents would be given the opportunity to state your cases. You would be filing by mail which takes 6 months or more to process. Then it would take time for the IRS to make their decision. If you truly should not have been claimed by your parents it would be simpler to have them reimburse you for any tax benefit you lost.
