Please make sure that you are trying to use the code in the correct product.
If you have a 21 character code, this is for TurboTax CD/Download.
If you have an 11 character code, this is for TurboTax Online.
The codes from TurboTax CD/Download will not work with TurboTax Online and vice-versa. If you need a refund, this page has information on how to get one: https://turbotax.community.intuit.ca/replies/2647900
If you are using the right code for the right product & it still doesn’t work, please contact our phone support as they will be better able to assist you (*Not available for TurboTax Free users*). https://turbotax.community.intuit.ca/replies/3152013
every time I tried to put my activation code is not accepted, it said put a valid activation code
send me a phone number where I can get help with my activation code
Both the Activation Code with the online purchased program for 8 users and the activation code provided by Turbo Tax, after calling Help Desk, do not work!!! Have used program for multiple years, will be switching next year. Changes are awful and it seems the "Upsell" is the most important feature to Turbo Tax now. Just want to use what i paid for.
Can you please try using a different browser and clean your cache
Then try again, if this still doesn't work, please contact customer service once again and have them escalate your issue so that they can verify why it is not accepting your prepayment codes.