Amazon offers Prime members downloads of TurboTax Premier Federal + E-file + State 2014 for Windows or Mac, bundled with a Refund Bonus Offer, for an in-cart price of $59.99. That's $13 under the lowest total price we could find for a physical copy elsewhere, although most merchants charge $90 or more. The software guides you through your personal income taxes and includes five Federal e-Files.
The Refund Bonus Offer is valid on the purchase of an Amazon gift card via a portion of your federal refund made through TurboTax, adding up to an extra 10% to the value of the gift card. (For example, apply $500 of your federal refund toward an Amazon Gift card for a final gift card amount of $550.)