February 28, 2018 @ 12:00 am - March 1, 2018 @ 12:00 am Begin withholding on employees who claimed exemption from withholding in 2017 but did not file a W-4 to continue withholding exemption in 2018 (see Pub 15 for details).
February 28, 2018 @ 12:00 am - March 1, 2018 @ 12:00 am File a new Form W-4 if you claimed exemption from income tax withholding in 2017 (see Publication 15 for details).
February 28, 2018 @ 12:00 am - March 1, 2018 @ 12:00 am File Forms 1096, 1098, 1099 (except Form 1099-MISC reporting non-employee compensation), and W-2G if you file paper forms.
