Yes, you can file on the app with TurboTax for your 2020 tax return. Please make sure your mobile TurboTax app is up to date and you are logging in with your correct TurboTax user ID and password.
Also, make sure you log out of TurboTax app and then update the app. Then completely shut down your phone prior to logging back into TurboTax.
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I figured it out. Apparently, at some point last year, my TurboTax app became "turbo" which I guess is different from TurboTax. I uninstalled turbo and installed TurboTax and now I can see everything to file taxes