Getting your W-4 withholding right means neither owing a surprise tax bill nor handing the government an interest-free loan all year. This 8-question quiz looks at your recent filing history, income sources, and how your W-4 was filled out to estimate whether you're likely under-withholding, over-withholding, or about right. It takes about 2 minutes.
Once you have your result, use the W-4 Withholding Calculator to figure out the right values for your actual paycheck, or the Tax Refund Estimator to project your likely refund or amount owed before you file.