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 you are still not able to resolve your code issue, please contact our phone support team phone support team for more assistance.