Withholding planning

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IRS Notice 2018-14: 1) extends the effective period of Forms W-4 furnished to claim exemption from income tax withholding under § 3402(n) for 2017 until February 28, 2018 and temporarily permits employees to claim exemption from withholding under § 3402(n) for 2018 by using 2017 Form W-4, (2) suspends the requirement that employees must furnish their employers new Forms W-4 within 10 days of changes of status resulting in fewer withholding allowances, (3) provides that the optional withholding rate on supplemental wage payments is 22% for taxable years 2018 through 2025, and (4) provides that, for 2018, withholding on annuities or similar periodic payments where no withholding certificate is in effect is based on treating the payee as a married individual claiming three withholding allowances  under § 3405(a)(4).