It’s Simple.
We would be “too busy” and unavailable for at least the first ONE THIRD of the year. We’d be occupied doing income tax returns. This is how most CPA’s spend their time.
Besides, I don’t enjoy doing taxes. In fact, I hate it. I don’t even do my own, I have a CPA for that. That’s what they are good at. They train for hours every year just to keep current on the new rules and laws.
Most CPAs dabble in bookkeeping and payroll just to keep certain clients happy who insist they do them. They usually relegate these tasks to low level clerical staff. CPAs don’t really want to be doing my kind of work.
You should have the right people doing the right work. That’s what is most efficient and therefore cost saving.