Are you the owner of all these accounts? Does each account have unique sign-on credentials?
See this TurboTax support FAQ for importing Form 1099s - https://ttlc.intuit.com/turbotax-support/en-us/help-article/import-export-data-files/import-1099s/L2...
See this TurboTax support FAQ for importing a Form 1099-B - https://ttlc.intuit.com/turbotax-support/en-us/help-article/import-export-data-files/enter-1099-b/L7...
