Since the new tax cuts and jobs act was passed, the IRS has posted a withholding calculator. The IRS recommends everyone take a paycheck checkup to ensure they’re withholding the proper amount of taxes from their paycheck. If your calculator and actual withholding are not in sync, you should send an updated W4 to your HR department ASAP! Click the learn more button to go to the IRS.gov web page with the calculator and blank W4 forms or copy and paste this link into your browser’s address bar. https://www.irs.gov/individuals/irs-withholding-calculator