I want to convert QB online to QB desktop Pro 2016.
Thank you for posting in the Community. I'm here to assist you with converting data from QuickBooks Online to QuickBooks Desktop.
You can use data export to convert your data from the online version. After exporting the data, you can proceed with importing them to QuickBooks Desktop.
Please note that there are limitations when migrating to another version of QuickBooks. You can check the Export Limitations article to understand more about the limitations and capabilities of the process.
For the detailed steps on how to export and import data, you can check the article below: