Can I refile an efiled tax return with the downloaded version even though I prepared and efiled the tax return with the ONLINE version

Unfortunately there is no way to export returns out of TurboTax Online. You can get PDF copies of your returns, but those can’t be opened in TurboTax CD/Download.

Here is how you can print a copy of your tax return in TurboTax Online: https://turbotax.community.intuit.ca/replies/2648070