You can (sort of) receive up to 10% additional Federal Tax Refund in the form of Amazon.com Gift Card if you file with TurboTax and use some or all of your Federal Refund to purchase an Amazon.com Gift Card from TurboTax. For example, your $500 of Federal Refund could purchase a $550 Amazon.com Gift Card. Details are available here. Here is a screenshot for your reference.
Originally posted earlier, this is just a friendly reminder.