By Jan. 22, 2017, employers must use only the new version of the Form I-9, Employment Eligibility Verifcation, dated 11/14/2016. Until then, they can continue to use the version dated 03/08/2013 or the new version.

What are the changes to the form?

• Section 1 of the form asks for “other last names used”rather than “other names used.”
• Certification for certain foreign nations is streamlined.
• The addition of prompts to ensure information is entered correctly.
• The ability to enter multiple preparers and translators.
• A dedicated area for including additional information rather than having to add it in the margins.
• A supplemental page for the preparer/translator.

The instructions have been separated from the form, in line with other USCIS forms, and include specific instructions for completing each field.

The revised Form I-9 is also easier to complete on a computer. Enhancements include drop-down lists and calendars for filling in dates, on-screen instructions for each field, easy access to the full instructions, and an option to clear the form and start over. When the employer prints the completed form, a quick response (QR) code is automatically generated, which can be read by most QR readers.

Source: https://www.uscis.gov/news/news-releases/uscis-revises-form-i-9-used-all-new-hires-us