Are you going to owe the IRS a lot of money this year? Money you won’t have at April 18? You can set up an Installment Agreement with the IRS and make monthly payments to pay off your taxes. You will owe penalties and interest on the taxes until you pay them off, but you can pay them off up to 36 months, and you can always pay more then the agreed upon monthly payment (Yes, the IRS is willing to take more money than you agreed to pay) and pay off things sooner. Here is a link to the IRS site talking about installment agreements:
http://www.irs.gov/businesses/small/article/0,,id=108347,00.html
Just like buying a car, isn’t it?