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 Individuals: File your tax return if you did not pay your last installment of estimated tax by Jan 16th (see Form 1040-ES)