On January 11, 2018, the IRS issued Notice 1036, which provides the percentage method tables for income tax withholding in 2018. Key developments include: The flat withholding rate on supplemental wages, such as equity awards, of $1 million dollars and under a year is now 22% – down from 25%. As anticipated, the mandatory supplemental withholding rate for compensation in excess of $1 million is now 37% – down from 39.6%. The backup withholding rate…