Uncle Sam has decided that Rapper Fat Joe will have to sit in a Federal Prison for 4 months after failing to pay taxes on more than 3 million dollars in income from 2007 – 2010.He owes the IRS more than a million dollars for the 2007 – 2008 tax period.The IRS is stating there is an estimated cost of $718,038 to the government , TMZ tried to get a reaction from Joe about his sentence but Joe was not interested in speaking on it.