The IRS encourages everyone to use the Withholding Calculator to perform a quick "Paycheck checkup". The Calculator helps you identify your tax withholding to make sure you have the right amount of federal tax withheld from your paycheck at work.
Plan Ahead: Tips for Using This Program:
The Calculator will ask you to estimate values of your income and other items that will affect your 2018 taxes. This process will take a few minutes.
Click here: IRS Federal Withholding Tax Calculator to access the site.