You should have mailed your Federal Tax Return to the address noted in the Filing Instructions page when you printed the tax return for mailing.
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
Do you mean that you want to know what address your refund was mailed to? Your tax return is the form you send to the government that shows your income and calculates your tax. The money the government sends back to you is your refund.
If you are getting your refund by mail, the IRS will mail your refund to the address you entered on your tax return. You can see the address at the top of Form 1040. DoninGA told you how to see your tax return, if you did not save a copy of it.
If you filed by mail, and you really are asking the address that you mailed your tax return to, TurboTax has no way of knowing that. You mailed the tax return yourself.