It is showing you are using the Online version. You would need to create a new account for the additional return. If it is a very basic return, you can use the Free Edition.
How do I start another return in TurboTax Online?
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-start-another-return-in-turbotax-online/00/25596