I don't think you need to get to Turbotax Online.
If you have downloaded and installed Turbotax on your desktop, you should be able to use it there.
Just because you have your data on your desktop does not mean it is duplicated and accessible online - it is not.
You can use the HELP function from inside Turbotax (desktop) by clicking the "Search" link in the upper right of your screen, next to the magnifying glass and typing your topic in the text box.
Alternately, you can search this resource for your topic, or GOOGLE your topic (precede this search with "IRS" to get the IRS instructions.
If you still need help with a specific topic, I suggest you add a new request for help in this forum.
I hope this helps.
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