Purchase eFile for Illinois

[nello]

I bought TurboTax Deluxe for Mac from Costco that includes a $10 credit to use on a product add-on.

How do I purchase eFiliing for my 2025 Illinois (state) return?

Thank you for your assistance.

- nello 

[xmasbaby0]

What exactly did you purchase from Costco?   Costco (and other retailers) can sell TurboTax Deluxe with only federal software or with federal + state included.   I see both on the Costco site.   If you bought the cheaper "federal" only, then in order to get state software you will need to pay $40 for a state download, and then you can use the $10 off on the $25 state e-file fee.    It is a better value to buy the federal + state  if you know you will be preparing a state return.