Forms W-2 for 2016 are due January 31 for all copies. In the past, you had to provide Forms W-2 to your employees by January 31. Now the January 31 deadline also applies to copies submitted to the Social Security Administration.
The due date for filing all copies of 2016 Forms 1099-MISC with non-employee compensation in Box 7 is January 31, 2017. For these forms, the January 31 due date also applies to both paper and electronic filing.