How to Fix Your Tax Withholding for 2019

The key to fixing your tax withholding is having the right information on file with your employer. The way that you set up your tax withholding at work is by using an IRS form called the Employee’s Withholding Allowance Certificate. Numbered Form W-4 by the IRS, this form looks deceptively simple, with just a handful of lines that seemingly includes mostly basic information about yourself and your personal and financial situation.

Source: How to Fix Your Tax Withholding for 2019