It patently false that Obama will raise your taxes if he's elected although it's one of the favorite lies that the McCain campaign likes to spread. The truth is that 95% of Americans will experience a tax cut under the Obama plan even though more than half have swallowed the McCain BS whole.
So How much will you get back under Obama proposed tax cut? Here a handy calculator from some folks at the Brookings Institute. You can also see how much more you pay if McCain gets elected.