Which AI Calculates Taxes Correctly?

I tested out having Claude do my taxes (I first painstakingly censored the docs). It came to within 1.5% of what my Accountant calculated. I intentionally just dumped the source docs into a folder and let it figure it out, no additional prompting.

1.5% is both terrifying from a Citrini scenario, but also not nearly close enough yet to replace my accountant. Like with everything the question will be how quickly it can add ~2 9s of accuracy - is that 2 years or 20