It's possible that the rental income was enough to disqualify you from an income based credit or benefit.

You can see a detailed summary of your return in the online edition of TurboTax by following the instructions on this TurboTax FAQ: How can I see a detailed summary of my return in TurboTax Online?

You can also see the actual CRA forms that make up your return by saving/printing your return. This TurboTax FAQ tells you how to save/print a copy of your tax return in TurboTax Online: How do I print/save a copy of my return in TurboTax Online?

If you are still not able to resolve this issue, please contact our phone support team for more assistance.