Do you mean this?
https://turbotax.intuit.com/referral/?cid=soc_frb_invtfr_footer-ty21
Not sure what $10 you are asking about. But when you use online TurboTax, every return needs its own account and user ID.
When you use Online TurboTax, you get one return per fee. Each return needs its own account and user ID. If you use the same account and user ID for a second return, you overwrite the first one and lose it forever.
https://turbotax.intuit.com/personal-taxes/online/
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-start-another-return-in-turbotax-onli...
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**