No. TurboTax accounts cannot be combined, and you cannot move returns from one to another. And, if you use your own account and user ID for her return, remember that with online TurboTax you get ONE return per fee. If you use that same account and user ID for another 2018 return, you will overwrite the first return and lose it forever.
**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.**