Make sure you are in the same account you used for your 2020 return.  See the following for more information.

How do I access a prior-year return?

https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-access-my-prior-year-return/00/27010

If you used TurboTax, you can access your return by logging in using the same TurboTax account that you used to file your previous return. Please see How do I access a prior-year return? for instructions.

If you just need your AGI, you can also get it by obtaining an online tax return transcript from the IRS. Please see Can I get a copy of my tax return from the IRS? for more information. 

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