Download from both 2024 online and 2023 desktop versions of Turbo Tax to 2024 Desktiop version of TT (Premier)

I did our 2023 taxes in Turbo Tax Premier Desktop.   I started doing 2024 tax return in TT Online version so I could have access to Live Help when I needed it.  However it seems I cannot upload the very many depreciation schedules I have in the 2023 tax return in Turbo Tax Desktop (Premier) and I would have to reenter all of those depreciation schedules all over again.  So I plan to switch to TT Premier Desktop as I know when I start the 2024 TT Desktop Premier I can transfer the 2023 tax data, including all of those depreciation schedules, into the 2024 Turbo Tax Premier desktop.

- can I also download what I have already entered into 2024 TT Online to the 2024 Turbo Tax Premier desktop without losing what I have transfer in from the 2023 TT Premier Desktop?

- If I use 2024 TT Premier Desktop, can I get Live Assist help/support to tax questions?

Thanks in advance.