When you use online TurboTax software 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, the second one overwrites the first return and it is lost forever.
If you have multiple returns to prepare and file for various family members, etc. the desktop download is more cost effective. With desktop you can prepare and e-file up to five federal returns and the corresponding state returns ($25 state e-file fee) for the one-time cost of the download program.
**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.**