How do I upgrade from TurboTax Premium to TurboTax Live ($169 version)? Do I pay full $169 or only the difference between TurboTax Premium and TurboTaxLive?

If you would like to switch to TurboTax Live Online, please see this help article: How do I switch from TurboTax CD/Download to TurboTax Online? In TurboTax Live Online you do not pay for the program until you are ready to file. 

If you switch to TurboTax Online, you can request a refund for your TurboTax Premier Desktop product by following the steps in this help article:  How do I request a refund for my TurboTax product?