That depends on how organized you are.
A friend of mine is in the house flipping business, we use the same accountant. He does nothing but keep reciepts, and sends them to the accountant every month. The accountant has to sort through them all, do all the paper work, ect... He gets billed for all the time, and thats' the way he likes it.
Me, I use Quick books, I do everything and put everything in the proper accounts. I email the accountant the file at the end of every quarter, he sends me the forms and a bill for one hours work.
I will tell you this, some accountants are like attorneys, they will not tell you every thing you can do to help yourself. They want to bill you to make money, and they want to keep billing you. Find one who will work with your needs. Don't be afraid to change accountants if one doesn't feel right.