A W - 2 tax form shows the amount of taxes withheld from your paycheck for the year and is used to file your federal and state taxes. (turbotax.intuit.com)
If you have federal taxes withheld from your paycheck, the only way you can receive a refund when excessive amounts are withheld is if you file a tax return. (turbotax.intuit.com)
If you need to have additional taxes withheld from your paycheck, obtain a new W - 4 form from your employer or human resources representative. (sapling.com)