“We heard the concerns from taxpayers and others in the tax community, and we made this adjustment in an effort to be responsive to a unique scenario this year,” said IRS Commissioner Chuck Rettig. “The expanded penalty waiver will help many taxpayers who didn’t have enough tax withheld. We continue to urge people to check their withholding again this year to make sure they are having the right amount of tax withheld for 2019.”

This means that the IRS is now waiving the estimated tax penalty for any taxpayer who paid at least 80 percent of their total tax liability during the year through federal income tax withholding, quarterly estimated tax payments or a combination of the two.

However, the withholding tables couldn’t fully factor in other changes, such as the suspension of dependency exemptions and reduced itemized deductions. As a result, some taxpayers could have paid too little tax during the year, if they did not submit a properly-revised W-4 withholding form to their employer or increase their estimated tax payments. The IRS and partner groups conducted an extensive outreach and education campaign throughout 2018 to encourage taxpayers to do a “Paycheck Checkup” to avoid a situation in which they had too much or too little tax withheld when they file their tax returns.