I used Claude for my taxes last year. It was fine.

Previously, I used Free Fillable Forms which does force me to know more about tax forms than a more abstract software program. Most people's tax situation does not change very much year to year so it's fairly easy to verify - you can check if my tax return looks fairly similar to the previous year taking into account any differences.

If you have a substantially different year for whatever reason, sure get an accountant to double check. But if you're paying for an AI frontier agent, there's really no need to pay for a 3rd party program anymore.