What Is the Difference Between a W-2 and a W-4? A W-4 provides an employer with an employee's tax ID number (usually SSN), marital status, number of allowances and dependents, and how much tax to withhold with each paycheck. The W-4 is filled out when an employee is hired or ...
The withholding allowances they claim When the employee fills out aW4 tax form, the factors listed in the bullets above are detailed in the form, and based on this, federal withholding tax is calculated. If too little withholding tax is deducted throughout the year (because the W4 form was...