We have a marvelous thing in developed countries where the IRS (equivalent) already knows how much your tax should be paying[0] and you basically have to just look at a few numbers and click "That seems right". They even have a form where you can change things that aren't correct! Marvelous, I know... we've had that for 15+ years in Denmark.

EDIT: To add, if you get it slightly wrong... you're fine, it'll be adjusted for in next year's taxes.

[0] ...because it has to, in order to investigate evasion.

Tax filing in the US being so deeply intertwined with proprietary software is extremely unfortunate. I actually emailed Richard Stallman the first time I had to file to see what he does. He basically recommended grabbing the forms as PDFs, using xournalpp to edit/sign them, then print and mail them the old-fashioned way. I did do this but I found the process clunky and upsetting. I would kill to have some official government thing that's free software and covers all the common cases, or to have it automated like in other countries. I simply should not have to do this myself, it's ridiculous. I don't care about a tax refund either, just don't make me do this at all. Maybe leave the process optional for those who want to try to game the system and get some money back.

I don't see AI as a solution here as it's all rather murky and proprietary.