I am trying to export data from QBO into QB Desktop, I have tried multiple times without any success. Can anybody help me out?

Do you need to migrate from QBO US version to QBD US version? Have you visit the following reference?

https://quickbooks.intuit.com/learn-support/en-us/import-or-export-data-files/export-and-convert-you...

Hi there, @info1251.

I'm glad to share with you the steps so you can export your data from QuickBooks Online (QBO) to QuickBooks Desktop (QBDT). Before that, may I asked if you've encountered an error message when attempting to export the data? This way, I can make sure that we're on the same page so I can provide an accurate solution to your concern. 

In the meantime, you can also use this URL to initiate the download in Internet Explorer to export the data: http://qbo.intuit.com/app/exportqbodatatoqbdt. Next, follow the steps below to export your QuickBooks Online data: 

1. Select the Get Started button in the Export Overview window. 
2. Click Install under ActiveX Control Now.
3. When it's finished, hit Continue.
4. Choose the data you want to export, then tap Continue.
5. Review the limitations and choose Continue.
6. Enter your contact info and then tick Continue.

Then, please proceed to Step 4: Finish exporting your data of this link: Export and convert your QuickBooks Online data to QuickBooks Desktop. 

Additionally, you may check out this article to learn about limitations when you convert from QBO to QBDT: Limitations when you convert from QuickBooks Online to QuickBooks Desktop. 

Also, here is a helpful article that you can read through to guide you in navigating the QuickBooks Desktop version: Get QuickBooks Desktop user guides. 

Feel free to post a reply below if you have any other questions. I'm always around to help. Stay safe and take care always.