First, please make sure that you have purchased the right product. The codes for TurboTax Online will not work with TurboTax Desktop & vice-versa.
Second, if you bought TurboTax at a retailer (Costco, Walmart, Staples, etc…), please make sure that you are using the code that came in the package. It may be on a slip of paper or on a scratch-off card. It is not on the outside of the box or on your receipt.
If you have boughtTurboTax Online, please go to turbotax.ca/activateto 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.