@TurboTaxAniqua can you please tell me how to proceed?

Thanks for the help, it was the need to login to my account that's the difference this year.

@Anonymous what does that mean?  The package clearly states "Activation code for 8 returns". Do I have to log in to my fathers account in order to file? How do I access my account if I do so?

Is that code already linked to your father's account? If the code is activated and linked to one account, it cannot be linked to another account. 

So does that mean I cant even use it to file my return? Or can I log in to his account and file?

@hankstar1 Yes, it states 8 returns but one account or user only. You can certainly log into his account to prepare and file your return.

Turbotax Premier purchased at Staples now says Licence Code is invalid

@Cristobal 
First, please make sure that you have purchased the right product. The codes for TurboTax Online (DIY) will not work with TurboTax Desktop & vice versa.

If you purchased TurboTax from a retailer (e.g., Costco, Walmart, Staples), please use the code included in the package. It could be on a slip of paper or a scratch-off card. It does not appear on the outside of the box or on your receipt.

If you have bought TurboTax Online, please go to turbotax.ca/activate to use your code before you start your returns. You can see this TurboTax FAQ for step-by-step instructions:  In TurboTax Online, how do I use a prepayment code? Please note that you can only use the code once in one account. Using the code again will give an error message.

If the Lince code is already linked to one account, it cannot be linked to the second account.

Thank you for using TurboTax.