Get Intuit's 2012 TurboTax Deluxe Federal and State Edition for $39.99 at Amazon. With free shipping, this is the best price we could find for this highly rated tax filing software by $20. It is available for Instant PC or Mac Download or PC or Mac CD-Rom and includes one state product download. It is compatible with the following PC/ac platforms Windows Vista / 7 / 8 / XP, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion. Sales tax is not charged in most states.