TurboTax won’t allow you to input anything other
than a Canadian or US phone number. If you have a phone number from another
country, just don’t include it. The CRA will contact you by mail.
If you have a Canadian or US phone number, make
sure you are only typing it in using numbers - no special characters or spaces.
There should be total of 10 numbers. Ex: 1234567890
You may want to select and delete everything in
each box before retyping, just in case there is a hidden space causing the
problem. You can also leave the phone number space blank, as it is not a
mandatory field. The same for the email address.
If you are still unable to resolve this issue,
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