We got a notice from turbo tax saying we need to fix our return. When we log in to our account Turbo tax shows it we didn't even file, but we did online with them. help

You might have filed in TurboTax under a different user name.  If you had a refund, check the status of your return at  Where's My Refund through IRS.gov.  You can also request a transcript of your 2020 return from IRS.gov.  Click here to start the process.