Costco does not sell the online product. Costco sells the CD/download product that you install on your computer. The early bird price from TurboTax for the CD/download Home & Business product is $109.99 including state. Retailers often sell TurboTax products for prices below what TurboTax sells them for direct.
The early bird price from TurboTax for online Self Employed is $89.99 for federal plus $39.99 for state. That is apparently the product that you used.
