If you are claimed as a dependent when you shouldn't have been, you will need to print, sign, and mail your tax return. If you can, reach out to the party that claimed you and recommend to them that they amend their tax return. The IRS will contact both parties to determine who is entitled to claim you, and will credit the person that met the requirements. If it is determined that the other party should not have claimed the dependent, the IRS will make them pay back the exemption along with any penalties or interest associated with their false claim.