There is no Forms method in the TurboTax online edition. To see a detailed summary of your return using TurboTax Online, select View detailed summary (usually located near the top of any screen). The Detailed Tax Summary page gives you line-by-line info on your income and credits.

You can also see the actual CRA forms that make up your return by saving/printing your return. This TurboTax Canada 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?