This could depend on the broker. I have multiple accounts at one broker. when I go to import I'm given the option of selecting the forms to import but the forms for both accounts are presented. For other brokers, a taxpayer must first select the account - then import only from that account, log out, go back to Turbotax select import and the broker, and then specify the other account. Others have other methods so you must contact them to see if they can provide guidance. For some brokers, from the threads I've seen, may not provide for import from multiple accounts
