TurboTax runs on Apple Silicon Macs because they run Rosetta 2. An Intel Binary does not run on Apple Silicon Macs without Rosetta 2. All new Macs currently come with Rosetta 2 installed. Starting with macOS 28 "Rosetta 2" will not exist. And no Intel Binary will run. The same reason a PowerPC binary will not run on an Intel Mac anymore after Rosetta "1" was discontinued. Go to the Applications section of the System Report to see the kind of application. A "universal binary" is a two forked binary with both an "Intel" binary and an "Apple Silicon" binary.
Here is the link to the press release from Apple: Intuit doesn't allow this.
Here is another link: About the Rosetta translation environment
