Hi Kath28. Thanks for joining the thread.

I can appreciate that you'd like QuickBooks Online to have more of the same features that are available to you in QuickBooks Desktop. As mentioned by my colleagues above, this feedback has been sent off to our product development team for review. We're always looking for new ways to improve QuickBooks Online. 

In terms of creating your XML file, I'd recommend following the steps above to export your information to Excel. Once in Excel, you'll have to utilize a third-party conversion tool to generate your XML file for submission to the CRA. I did a quick search and found this resource that may help: Convert Excel document to XML file. 

If you have further questions, please reach out to our tech support team. 

Cheers.