As we previously reported, USCIS had announced plans release a revised Form I-9 on July 17,2017. While the revisions and release were initially planned to accomodate the a new Final Rule on Parole for Start-Up Entrpreneurs, which was delayed, USCIS kept revisions to the Form I-9 on track.
Employers will have through September 17, 2017 to implement the new form. Forms completed for new hires and reverifications on and after September 18, 2017 need to be on the new form ( Revision date 7/17/2017 N).
A summary of the changes to the new Form I-9 can be found here.
The most recent version of the Form I-9 can be found here.