"Correctly" can mean many things. Also, with that kind of money, you can do some fancy law things which could create losses which would bring down the tax. There are a lot of standard things too. How big a house does the person have? How much medical expenses? How was the money earned? How much was contributed to retirement? Were there any passive losses to offset the income?
When you're talking about that kind of money, there are all kinds of things to do to change liability. Even the premise needs more information. "Business deal", what's that? What's that in great detail.
The point is that there is no way to calculate the tax owed. If all you're looking for is the amount to be paid on that amount, look on the internet for the tax tables.