For most folks, filing your taxes is already mostly automated and requires a time investment of maybe 45 to 60 minutes per year. Would it be nice to reduce that down to 20 seconds? Sure, but it's not going to materially change anything in the financial life of most people. I'm all for it if it could be done reliably at scale. Outlier cases where taxation is complicated enough that it's possible to engineer substantial and meaningful financial outcomes often count more as business finance than personal finance. I'm sure artificial intelligence will indeed be more disruptive to business and corporate finance. For true personal finance, though, I suspect it may be more predatory than helpful by selling people into bad decisions that sound smart (which banks, etc., already try to do with so-called financial advisors).

Keep in mind a 5% failure rate would likely be >10 million incorrect tax filings per year solely due to AI errors, not inclusive of additional incorrect filings due to human error as well.