Ok.... maybe it's just a matter of names/titles? A lot of folks have a tax place/company actually do their taxes, but when you say "have an accountant" that brings up the notion that someone has an accountant all the time that helps them with their financial things all along the way.
Certainly many people here save their receipts and documents through the year and then take it along with info on their income and let someone else fill out their tax returns to file. If you call that having an accountant, then yes many folks do that.
I did all my own up till about 2 years ago because my finances were very simple. I pay federal and state tax and the state kept changing things and although the info was the same, they complicated how it had to be entered and I said to hell with that and now I let the folks that file my federal taxes for free, electronically online, also file my state for a very small fee. So much easier and I no longer deal with it.