Hi Dear,
We have very good experience on QuickBooks Online integration. As the desktop version of QuickBooks is the initial version of Intuit's product, both QuickBooks Online and Desktop having similar functionality. So, we are functionally very good on it. As far as technical, using desktop SDK, we can create/update any type of transactions in QuickBooks desktop.
Please let me know, when can we meet for the demo of QuickBooks Online integration demo.
Kind Regards,
Mayuri Patel