On Jan. 11, 2018, the IRS issued revised tax withholding tables for employee paychecks. To comply with IRS Notice 1036, employers should implement the 2018 withholding tables as soon as possible, but no later than Feb. 15, 2018. The notice provides early release copies of the new percentage method tables for income tax withholding. To learn more about your tax responsibilities as an employer, refer to Publication 15 and recent developments at irs.gov.