To access your current or prior year online tax returns sign onto the TurboTax website with the User ID you used to create the account - https://myturbotax.intuit.com/
When you sign onto your online account and land on the Tax Home web page, scroll down and click on Add a state.
This will take you back to the 2020 online tax return.
Click on Tax Tools on the left side of the online program screen. Then click on Print Center. Then click on Print, save or preview this year's return. Choose the option Include government and TurboTax worksheets
This will still not allow me to preview my state return. Not helpful
If you have not paid the TurboTax account fees or have not filed the federal tax return, then you will not be able to preview the state tax return.
Only after the TurboTax account fees are paid or the federal tax return has been filed and accepted by the IRS can you view the complete federal and state tax returns.
When viewing the PDF of the tax returns, the state tax return forms and schedules are listed directly below the federal tax return forms, schedule and worksheets.