Deductions & credits
Thanks @Irene2805. TT 2020 Premier works as you describe.
However, and for me this is the key point, it is totally non-obvious how to handle a second home sale, which is not even mentioned on any of the screens! Contrast this with TT 2019, where Second Home was an option (see below) and the software walked you through the transaction.
So I guess my question is: Did TurboTax intend to transition to this much-less-helpful approach? Or have they simply made a mistake in assembling this year's software?
From TT 2019 (screen no longer available in TT 2020):
