Taxes are actually not a bad problem for AI, because a lot of the final calculations can be easily verified/sanity checked. The AI won't be able to get away with any math errors, the issues you'll likely see are incorrect categorisation of income or suboptimal deductions. The substeps like categorisation shouldn't be too difficult to manually verify
The problem is if you need to verify everything you might as well do it yourself.
I'm not convinced an AI will ever know how to distinguish a personal and business expense from a CSV dump of your credit card too.
If you're going to go down the rabbit hole of creating a CSV, you can already parse and categorize it pretty easily without AI. I've built and have been using https://github.com/nickjj/plutus for a bit now and I've gotten quarterly taxes down to less than 10 minutes.
