To get started, convert QuickBooks Online to QuickBooks Desktop (QBD), you should export your data from QuickBooks Online. To do this, click on the Gear icon in the left-hand corner, choose "Export Data", then the appropriate area to download (Reports or Lists) your financial data. You are able to export a QuickBooks Online company file to the desktop as a file (there you can create and download a QuickBooks Online Company into a `QBO` file. After you have exported your data, you will want to set up a company file in QuickBooks Desktop. Then, go to import and upload the QBO data to the desktop version. Once you have uploaded the data, you will then have to map your accounts and adjust your settings to align your setup with the desktop. It is worth noting that with a file like QuickBooks Online, you can transfer basic data like reports and lists, but not all data types are supported fully for migration.