Offer your insights or judgment on the input financial query or topic using your financial expertise. Reply as normal question answering

1 EIN doing business under multiple business names
You're confusing a lot of things here. Company B LLC will have it's sales run under Company A LLC, and cease operating as a separate entity These two are contradicting each other. If B LLC ceases to exist - it is not going to have it's sales run under A LLC, since there will be no sales to run for a non-existent company. What happens is that you merge B LLC into A LLC, and then convert A LLC into S Corp. So you're cancelling the EIN for B LLC, you're cancelling the EIN for A LLC - because both entities cease to exist. You then create a EIN for A Corp, which is the converted A LLC, and you create a DBA where A Corp DBA B Shop. You then go to the bank and open the account for A Corp DBA B Shop with the EIN you just created for A Corp. Get a better accountant. Before you convert to S-Corp.