January 31, 2018 @ 12:00 am - February 1, 2018 @ 12:00 am File Form W-3 with Copy A of all Forms W-2 issued for 2017.
January 31, 2018 @ 12:00 am - February 1, 2018 @ 12:00 am File Form 1099-MISC with IRS if you are reporting nonemployee compensation.
January 31, 2018 @ 12:00 am - February 1, 2018 @ 12:00 am File 2017 Forms W-2, W-2AS, W-2CM, W-2GU, W-2VI, W-3 and W-3SS with the SSA whether you file using paper forms or electronically.