You will not get that screen if TT detects that there is no allocation needed. I also have TurboTax Deluxe (Windows 10 desktop) and do get that screen. This year, I get a screen titled "Choosing a larger education credit or deduction" with an “Amount Used to Calculate Education Deduction or Credit” box .
When I changed my entries, so that I no longer needed to allocate expenses (I had enough expenses to cover the 529 and give me the full AOC), I got that same screen that you did ("We'll make this entry zero that's no longer needed "), along with an explanation. That may be new this year.
It means you probably changed some entries.
