Can I convert my TT Deluxe Desktop purchase to the TT Online Deluxe version?

Due to unforeseen circumstances, the Desktop version I bought cannot be installed on my machine (limitations of my Mac and it's OS upgrade limitations.)

 

I had purchased the federal/state combo of Turbo Tax Deluxe. Is there an option for me to convert the desktop license to the online license so I can just use TT online with the deluxe functionality?

 

Thanks;

Nancy