To become a lawful permanent resident based on the immigrant investor visa EB-5 category, eligible investors must file Form I-829, Petition by Entrepreneur to Remove Conditions. Form I- 829 must be filed within 90 days before the second anniversary of your admission to the U.S. as a conditional resident.
You should file the Form I-526 at the USCIS Service Center having jurisdiction over the area in which the new commercial enterprise will be principally doing business.