Remember that test where you ask a LLM whether 9.11 or 9.9 is the bigger number? [Just checked gpt-4o still gets it wrong]

I don't think you'll find many sane CFOs willing to send the resulting numbers to the IRS based on that. That's just asking to get nailed for tax fraud.

It is coming for the very bottom end of bookkeeping work quite soon though, especially for first draft. There are a lot of people doing stuff like expense classification. And if you give an LLM an invoice it can likely figure out whether it's stationary or rent with high accuracy. OCR and text classification is easier for LLMs than numbers. Things like concur can basically do this already.