TaxAct will not directly support the 2020 Form W-4 Employee’s Withholding Certificate. We recommend using the IRS Withholding Estimator tool. It's capable of generating a pre-populated Form W-4 that can be filed with an employer. For more information, visit the IRS Tax Withholding Estimator webpage.
Note that any link in the information above is updated each year automatically and will take you to the most recent version of the document at the time it is accessed.