Thanks for the in-depth details of the troubleshooting you performed on your end as provided by my colleague, Azuos.

The minimum system requirements for Windows PC is Windows 7 or newer at least 2 GB of RAM. Before downgrading your Windows, let's try using other supported browsers like Microsoft Edge and Google Chrome to export your data.

If the same thing happens, it would be best to contact your IT personnel to further assist you with downgrading your Windows version.

If the option doesn't work for you, I'd suggest contacting our Customer Support Team. They'll check other ways to successfully export your data into QuickBooks Online (QBO). Just follow the steps provided by my colleague to reach out to them.

For more details about QBO system requirements, please refer to this article: System requirements for QuickBooks Online, QuickBooks Online Accountant, and QuickBooks Self-Employe....

Feel free to go back to this thread if you need a hand with filing your year-end forms. I'll be here to help.