What can a self-employed entrepreneur do in order to avoid being surprised by how much is owed at tax time?

contributions made after 1986. after-tax contributions to employer plans made after 1986 are recovered pro rata with taxable amounts. the remaining $80,000 is from pre-tax contributions, employer matching dollars, and earnings on those amounts.

it's actually a very difficult task, due to not many people can make 2 million dollars in 2 years. besides that, to the not-so-realistic ideas, you can create a business. it could be practically anything, but make it into a business that isn't that known yet, you get me? also, lets not forget about stock market. that's where all the good stuff happens. use investments at the beginning and begin to raise up your business or whatever you're going to do. as this is a very non-realistic idea, it's still worth the shot!