To resolve this issue, select everything that is in the postal code box and delete it. Then re-type the postal code, making sure to use only numbers & letters and no special characters or spaces. There should be total of 6 characters. Ex: a1b2c3
If you are still unable to resolve this issue, please contact our phone support as they will be better able to assist you. You can use the form on this page to get the right phone number to call: https://support.turbotax.intuit.ca/contact/