Can I use my TurboTax Premier to file a TurboTax Deluxe return? I don't care about the price difference as I already purchased the box from Costco.

[TurboTaxBrenda]

Yes, you can file any income tax return except for a self-employed return. 

Thank you for choosing TurboTax.

[soupydumplings]

How come it says that I have 12 returns available on my account, but when I apply the exact same code on my account at checkout, it doesn't work? I confirmed multiple times it's the exact same code within the exact same account.

[TurboTaxSusan]

You only need to use your TurboTax Online code once on the activation page. Using the code again will just give the error message you see.