Form W-4 is used to help your employer determine how much federal tax to withhold from your paycheck. That's why you'll complete it and give it to your employer - not the Internal Revenue Service ...

The new W-4 also has an important section for people with multiple jobs and for couples who both work. Those taxpayers my need to check a special box that affects how much money is withheld on payday.

The W-4 form makes it easy to adjust your withholding to account for certain tax credits and deductions. There are clear lines on the W-4 form to add these amounts — you can't miss them.