Can I use my account (user name and password) to file my dependent children's tax returns? Or do I need to create individual accounts for each?

[Odell]

If you have several returns to file, you may be interested in purchasing a TurboTax CD/Download, as you can e-file up 5 federal returns for no extra charge, whereas you will be charged for each return (unless eligible for free filing) using TurboTax Online. 

To file an additional return using TurboTax Online, you will need to create a new account.