If you have not paid for it just clear and then purchase the download.
How do I clear and start over?
https://ttlc.intuit.com/replies/4248526
If you have paid then call customer support.
There is no single published number because it changes contently depending on the nature of the call and agent availability. Following the link below will either give a current number for you to call or take your number for a callback.
Here is a TurboTax FAQ for contacting customer support.
https://ttlc.intuit.com/questions/1899263-what-is-the-turbotax-phone-number
You can move your Online file to the Desktop program and continue without paying for Online or needing to reenter your info.
To continue in the desktop version see this…….
After you get the program installed the first thing to do before you open your tax return .tax file is to update the program and install any state programs you had. Then open your file. So you first might need to start a fake return to be able to download the state program (go to FILE - NEW).
You can buy the CD/Download here,
https://turbotax.intuit.com/personal-taxes/cd-download