I need to prepare a second return different taxpayor

[LindaA]

You can only prepare one federal tax return per TurboTax Online account. If you want to prepare another return online, you'll need to create a separate account with its own user id and password. If you are preparing multiple returns for friends or family, it is more economical to use the TurboTax CD/Download software, which lets you e-file up to 5 federal returns at no extra cost. Please see the FAQs below for more information.

How do I start another return in TurboTax Online?  https://ttlc.intuit.com/replies/3288574

How do I switch from TurboTax Online to the TurboTax software? https://ttlc.intuit.com/replies/3302260