Good Morning Sylvia,
Actually according to the CollegeBoard, the layouts have been posted as of June 9th. According to their email, the "SAT Suite 2023-24 Electronic Score Report Data File Layouts Are Available". I actually submitted a ticket so that the data layout can get on your schedule to be built before the data becomes available.
Sylvia Nishimoto
06/16/2023 - The 2023-24 file layouts have not been posted yet. However, the 2023-24 Crosswalks are available and there are no apparent significant changes to the SAT, PSAT10/NMSQT or the PSAT 8/9 file layouts. We will test this further when the 2023-24 Sample Data is posted on the CollegeBoard site.