Good Morning, @markwwood.
To successfully import your QuickBooks Online (QBO) data to TurboTax Business, you'll need to transfer your QBO data to QuickBooks Desktop (QBDT) first. Don't worry. I've got you covered, and it's a super easy process.
Let's start with downloading a free trial of QuickBooks Desktop.
Once the download is finished, it's time to export your QBO data to QBDT. Here's an article that provides details and visuals to help you through the steps: Export and convert your QuickBooks Online data to QuickBooks Desktop.
After all of your data has been imported into QBDT, you can proceed to the last step of exporting to TurboTax.
If you run into any trouble along the way, just let me know. I'm always here to lend a helping hand. Have a splendid Friday!