Gemini and GPT did my (non-trivial) taxes this year. They're going to be laying off way more than 3k people.

How does this work, concretely? Do you just upload your W2/1099s/etc and prompt it to "do my taxes"? I imagine it's not that easy, but filing my (trivial) taxes with any of the well known tax prep services is easy enough that the LLM version can't get very much more complex than "do my taxes" and still be an improvement.