I am sure we've all seen the commercials. Here is a great article on just how false rightchange.com's ads are. (Be forewarned its a bit of a read) FactCheck.org: Right Change Is Wrong
What they don't mention is that a buisness can write off all expenses. I hardly pay any taxes as is because I write off everything, my lunch at work, the fuel to get there, my tools, I get most if it all back at the end of the year.