The Form 4868 extension request will be available in the PDF download from the TurboTax online editions after the online editions become available for tax year 2022 in early December.
To access your prior year online tax returns sign onto the TurboTax website with the User ID you used to create the account - https://myturbotax.intuit.com/
Scroll down to the section Your tax returns & documents. Click on the Year and Click on Download/print return (PDF)