The post-merger import may have to come through Morgan Stanley since they were the acquirer. be careful check for proper cost basis for any securities sales reported on their statements.
from MS website
Important: If your E*TRADE account transitioned to Morgan Stanley in 2023, you may receive two tax forms for 2023: one for your original E*TRADE account that reports all activity before the transfer date (the form name shown in the Tax Center will include “ETS”), and a second for your converted account that reports all activity after the transfer date (the form name will include “MSSB”). You may need to reference both forms in order to file your tax return. Please note there may be a slight timing difference in the availability of the two forms.
