A Moderator says his desktop program is also showing the state efile fee is 19.99 at the moment. It's possible there is an early filing season discount as there currently is on other TurboTax products. Whether or not it will switch to 24.99 later in filing season is not clear. In the meantime, there remains a discrepancy between what is posted at the TurboTax website and what is posted at Amazon.
