To convert a QuickBooks Online Edition company file to a desktop version of QuickBooks Pro, QuickBooks Premier, or QuickBooks Enterprise Solutions, use the Export Interview and follow the instructions to export either Lists only or Lists and Transactions.
For a visual guide to conversion that includes screen shots of the entire procedure, see Visual guide to export on the QuickBooks Online Support page
Note: You must log in as the QuickBooks Administrator to convert your company file and you must be using Internet Explorer to access QuickBooks Online.
Can I synchronize QuickBooks Online with my Desktop version?
Converting from QuickBooks for Mac to QuickBooks Online
Converting Data to and from QuickBooks Online from other versions of QuickBooks
Exporting to QuickBooks Pro/Premier