Those are temp files. Leave them for the moment, because they come in handy for a recovery should your computer crash while you've got the TurboTax program open. Once you're done with your return and have filed it, you can delete all those files (and only those files) with the tilde character as the first character.
This is most common if you're using the desktop version of the program. But I'm a bit perplexed myself, as my screen indicates you are using the Online version of the program this year.
