Big tax increases will hit millions of families and businesses a lot sooner than many realize if Congress and the White House don't agree on a plan to avoid the year-end fiscal cliff of automatic tax increases and government spending cuts. In fact, they already have. More than 70 tax breaks enjoyed by individuals and businesses already expired at the beginning of this year. If Congress doesn't extend them, a typical middle class family could get a $4,000 tax hike when they file their 2012 returns next spring, according to a private analysis. At the same time, businesses could lose dozens of tax breaks they have enjoyed for years.