kickassangel - there most definitely is an inheritance tax in America, but it is called an 'Estate Tax'.
A certain amount is exempt from tax, but once over that threshold, taxes are due to both the federal and state government.
From the IRS website:
" The applicable exclusion amount is $1,500,000 (2004-2005), $2,000,000 (2006-2008), $3,500,000 (2009), $5,000,000 (2010-2011), $5,250,000 (2013), $5,340,000 (2014), and $5,430,000 (2015)."