W4 Withholding Form 2024 Instructions. Your employer uses this form to determine how much income tax to withhold from your paychecks. Employees may also want to access the irs tax withholding estimator for help.
It is based on the employee’s data such as filing status and family size, which can vary from. Beginning with the 2018 tax year, personal and dependent exemptions are no longer used as deductions for calculating income tax.