If you used the TurboTax 2022 CD/Download edition installed on a personal computer the only way to file an extension was to print and mail the Form 4868 to the IRS.
You only need to start the TurboTax program on your computer and then continue the return you already started. If you paid any taxes with the extension you will need to enter the extension payment.
To enter, change or delete a payment made with an extension request (Federal, State, Local) -
Click on Federal Taxes (Personal using Home and Business)
Click on Deductions and Credits
Click on I'll choose what I work on (if shown)
Scroll down to Estimates and Other Taxes Paid
On Income Taxes Paid, click on the start or update button
On the next screen select the type of extension payment made and click on the start or update button
The federal extension payment will be shown on Schedule 3 Line 10. The amount from Schedule 3 Part II Line 15 flows to Form 1040 Line 31