The IRS Form 4868, Application for Automatic Extension of Time to File U.S. Individual Income Tax Return will be included in the PDF download for the 2024 tax return if you used the TurboTax online editions for your 2024 tax return.
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/
Scroll down to the bottom of the screen and on the section Your tax returns & documents. Click on the Year and Click on Download/print return (PDF)