When 2019 Online opens.....
There is a tricky way to clear out transferred info in the Online version. But doing this will also clear out all your entries. Go to Tax Tools > Tools > Transfer from your computer > Continue > then Continue without transferring.
Or you can just start a brand new account with a new username.
What did you use last year? You might be able to transfer from that. How to transfer into Turbo Tax Online
https://ttlc.intuit.com/community/entering-importing/help/how-do-i-transfer-last-year-s-return-into-...
