Federal income tax is one of the few big bills you can adjust in real time, and Form W-4 is the lever that controls it. If ...

Meredith Dietz is Lifehacker’s Senior Staff Writer. She earned her bachelor’s degree in English and Communications from Northeastern University, where she graduated as valedictorian of her college.

Adjust W-4 to manage tax withholding, ensuring it matches your expected yearly tax dues. Using IRS's Tax Withholding Estimator aids in precise tax planning and refund management. Change W-4 settings ...