On December 26, 2018, U.S. Customs and Border Protection (CBP) released the final draft of the revised CBP form 5106, the Create/Update Importer Identity Form.
The new form may be found here:
https://www.cbp.gov/trade/programs-administration/entry-summary/cbp-form-5106
The CBP announcement may be found here:
https://csms.cbp.gov/viewmssg.asp?Recid=23968&page=&srch_argv=&srchtype=&btype=&sortby=&sby=