What is "State Tax on Product"

I just got my federal return today. I chose to pay what I owed TurboTax with the refund so it it came through SBTPG. The total bank fee and the tax preparation and filing fees match my order. However, there is an additional fee that says "State Tax on Product" that SBTPG charged that was not on my TurboTax order. It's not much, only $14, but what is this additional fee and why was it not included with my TurboTax order? Is this an extra fee from SBTPG specifically that I should expect if I choose to pay what I owe to TurboTax with my federal return?