The fines for not filling in a T-1135 or not filling in one correctly are quite draconian. Filling in a T-1135 does not make you more or less liable to pay tax, its mainly a tool to catch out people who are trying to cheat the system. Listing on your T-1135 an overseas property that you may not have needed to list will cause you no problems but not listing a property that you should have listed could result in large fines. List your property on the T-1135 and then declare zero income (if that is the case) on the form would seem to be the safe option. Buy why not ring the Canadian Revenue service and ask them what is correct? I've always found them very helpful and reasonable.