To avoid as many tax problems as possible, you should ask for taxes to be withheld by the plan for you by the trustee, rather than taking the full amount and then paying the tax later. Paying later can result in under-payment penalties even if you pay in full when you file your return.
Depending on your other income, it is likely that you will owe 22% or 32% tax (12% bracket plus 10% penalty, or 22% bracket plus 10% penalty).
It's not really a fine, it's just that retirement accounts are supposed to be set aside for retirement, so there is an extra penalty on early withdrawals to encourage people to leave the account alone.
There are a handful of exceptions to the 10% penalty (look at the web page linked by @rjs ) but you will still owe regular income tax even if you are exempt from the penalty.
