Have you ever examined your W-2 before filing your taxes? One of the actions that you could do is to check your W-2 form since any mistakes in wages, withholding and personal information can create problems while filing your taxes. Check your w 2 against your salary and make sure the figures are correct and make sense. In case you don’t have any idea what is a W-2, just consider it as a form which provides information regarding your income and the amount of taxes deducted from it.