Yes, you can switch from TurboTax Online to Desktop, and transfer all of your data. For details on how to do so see the following TurboTax Help article:
How do I switch from TurboTax Online to TurboTax CD/Download?
The Desktop program has a Forms view will allow you to view your tax forms as you are working on your return. It also allows you to see and enter information on the underlying worksheets and schedules. This feature allows you to resolve some tax issues that you can't in the online version.
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