The Desktop CD/Download program is totally separate from the Online version. The LIVE added help feature and full service option is only available in the online versions. If you start in the Online version you can add the Live help later.
You can not apply the Desktop purchase to the online version.
What is LIVE
https://ttlc.intuit.com/community/choosing-a-product/help/what-is-turbotax-live/00/27191
Full Service is in addition to Live
https://turbotax.intuit.com/personal-taxes/online/live/full-service/
What is Full Service?
https://ttlc.intuit.com/community/choosing-a-product/help/what-is-full-service-by-turbotax-live/00/2...
Live service purchased through retail. It is only for the Online versions
https://ttlc.intuit.com/community/authorize-funds/help/what-is-turbotax-live-purchased-through-retai...
