Withholding the proper amount of tax
With only 10 weeks left in the year, it's a good time for taxpayers to make sure they've paid enough or not too much income tax. The Tax Cuts and Jobs Act changed how withholding is calculated. People who have more than one job or who have complicated tax returns may wish to change their withholding to avoid owing more tax on their 2018 returns. If necessary, they should give their employers a new Form W-4. The IRS Withholding Calculator is the best online tool for determining your federal tax liability.
A taxpayer that reduced his or her withholding in 2018 should check withholding again in January 2019 and may need to submit another new W-4 to avoid having too little withheld going forward.