In my case, it isn't as simple as filing for income from one employer each year. I collect royalties from NG interests, a significant portion of my income is bonus/incentive based, I have investments in both commodities and stocks that I may or may not have taken money out of each year....
It can get pretty complicated. Not to mention write offs, charitable deductions, medical/interest payments, etc. It is totally worth the <$200 for me to let someone who is an expert handle that for me.