Sorry yes. You need to setup a new online account. You can use the same email address for 5 accounts. If you use your account for someone else their return will overwrite your return and yours will be gone. Start a new account here,
https://turbotax.intuit.com/personal-taxes/online
If you buy and download the Desktop program that you install on your computer it can do multiple returns and efile 5 for free. You can buy the Desktop Download program here,
https://turbotax.intuit.com/personal-taxes/cd-download
