Your W-4 form tells your employer how much federal income tax to withhold from your paychecks. If you fill it out incorrectly, you might have too much money taken out each month—or not enough, leaving you with a tax bill when you file. The W-4 changes based on your life: getting married, having children, taking a second job, or claiming dependents all affect what you should report.
These articles answer the questions people ask most often about the W-4: what each line means, when you need to submit a new one, how to calculate the right withholding amount, and what happens if you get it wrong. You'll learn how your filing status, income, and deductions connect to the numbers you enter, and how to avoid common mistakes that lead to surprises at tax time.