Get your taxes done using TurboTax

The screen that you found under "Payments with 2021 federal extension" is not the only place where you can enter the amount paid with the extension. When you filed the extension with TurboTax it asked for several amounts, one of which was the amount you were paying with the extension. It's possible that you entered the $7,000 there. It would then also show up under "Payments with 2021 federal extension," even though you never visited that page.