When you log into your TurboTax Online account, you should see the option to access past years return. Keep in mind that it's very common for TurboTax users to have multiple accounts, so make sure you're in the same account you used to file your previous years. Refer to this article for navigation assistance: https://ttlc.intuit.com/questions/1900748-
it says "come back here after you have filed your documents and returns. My return was accepted. So I don't know what the problem is.
Try clearing cache and cookies, signing out and signing back in again.
how do I clear cache and cookies? I signed out and signed in but nothing changed.