Am I Having Enough Withheld ?
Am If you fail to estimate your federal income tax withholding properly, it may cost you in a variety of ways. If you receive an income tax refund, it essentially means that you provided the IRS with an interest-free loan during the year. By comparison, if you owe taxes when you file your return, you may have to scramble for cash at tax time — and possibly owe interest and penalties to the IRS as well.
When determining the correct withholding amount for your salary or wages, your objective should be to have just enough taxes withheld to prevent you from incurring penalties when your tax return is due. (You may owe some money at the time you file your return, but it shouldn’t be much.) You can accomplish this by reading and understanding IRS Publication 505, properly completing Form W-4 (and accompanying worksheets), and providing an updated Form W-4 to your employer when your circumstances change significantly. Read more here...
https://theretirementgroup.blog/2019/08/06/am-i-having-enough-withheld/