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? 

If the activation page isn't working, please clear your browser cache (or use a different browser) and try again. If you are still not able to resolve this issue, please contact our phone support team for more assistance.