I-140 petitions filed concurrently with I-485 application for adjustment of status are to be filed with the Dallas Lockbox. In cases where I-140 petitions are accompanied with Form 907, a request for premium processing, and filed concurrently with an I-485 application for adjustment of Status, the concurrent I-140/I-485 applications are to be filed with NSC or TSC, depending on the location of the petitioner.
USCIS has updated the Direct Filing Addresses for Form I-485 on its website