Hello there, @emmanuel-parcelh.

 There's no direct way to move your account from QuickBooks Online to Enterprise. What you can do is to export and convert your QBO data to QuickBooks Enterprise. 

Just to clarify, moving from QuickBooks Online to Enterprise is not an upgrade. It is a migration since QBO is cloud or web-based and runs using the internet while QuickBooks Enterprise is downloaded and installed on a computer. 

To export your data, you can follow the steps below:

1. Login to your QuickBooks Online account and click the Gear Icon.
2. Choose the Export Data and enter your reason why you're exporting your data. Then, click Continue.
3. Review your data from the export overview screen. Once ready, click Export to Excel.
4. In the Exporting from QuickBooks Online page, select Continue to Download.
5. Then, follow the rest of the on-screen instructions to complete the exporting process.

You can use this article for more step by step instruction when exporting data from QBO to Enterprise: Export data file from QuickBooks Online to Desktop.

I added some screenshots for your visual reference.

Please note that some information may not be included during the moving process. You may check out this article for additional information: Exporting limitations - QuickBooks Online to QuickBooks Desktop.

Let me know the result once you've tried the steps. I want to make sure you're able to export your data without any issues. If it requires additional help, let me know by clicking the Reply button below. Keep safe.