This is extremely poorly handled by TurboTax, many people are sent on goose chase based on:
- information provided on CRA website saying it can be eFiled
- presence of misleading "T1135 Confirmation number" in the Filling section right under question "Internet File this return ?" on of first form of TurboTax return aka "1. Info"
At the very least clear instructions should have been provided to mail the form. T2 users time is expensive and seems that everyone wastes 1/2h to discover it is not even supported
