How do I purchase the Deluxe package, it's only giving me an option for the Premier package which I don't need.?
You are currently showing under TurboTax Premier, from which you are posting. If you would like to downgrade to TurboTax Deluxe, you would need to use the Clear and Start Over feature.
You will find some additional information in the TurboTax FAQ's below:
Can I downgrade to a lower-priced version of TurboTax Online?