It’s important to revisit your tax withholding, especially if major changes from the Tax Cuts and Jobs Act affected the size of your refund this year. Even if you did a Paycheck Checkup last year, you should do it again to account for differences from TCJA or life changes. A Paycheck Checkup can help you see if you’re withholding the right amount of tax from your paycheck. Too little could mean an unexpected tax bill or penalty.
Please use the calculator found on the IRS Website at https://www.irs.gov/paycheck-checkup
Affordable Care Act (ObamaCare) Tax Guide
February 3, 2015
How long to keep income tax returns and related records