For Prime members only, Amazon offers TurboTax Premier Federal + State + Federal E-file 2014 for Windows or Mac bundled with a Refund Bonus Offer for an in-cart price of $54.99 with free shipping. That's tied with our mention from three days ago, since expired, and the lowest total price we could find by $14, 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.)

Of note, Costco offers it for the same price with free shipping for its members, although no bonus offer is included. (Non-members pay $3.50 more.)