Nobody in this public user forum has access to your case number.
If you used the CD/download on your computer then any data file only exists on your computer - TurboTax does not have have it.
You can only transfer 2018 tax information into 2019 and that must be done as the first step with a new tax return.
You can only transfer from a xxx.tax2018 (where xxx is the name) data file that is a file totally separate from the TurboTax application.
You cannot open 2017 or 2018 .tax data files without having the 2017 or 2018 software installed for Federal and any state that is in the data file. It is not necessary to open 2018 in order to transfer into 2019.
See these help articles.
https://ttlc.intuit.com/community/tax-data-file/help/find-your-tax-data-file-in-mac/01/26206?search-...
https://ttlc.intuit.com/community/tax-data-file/help/how-do-i-transfer-last-year-s-return-into-the-t...
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
