Thanks for your feedback, michael-green. 

While creating a quote from a previous invoice is not available yet in QuickBooks Online, we appreciate if you can send your valuable feedback. You can do that by going to Gear icon and select Feedback so it will be reviewed by our Product Developers. Most of the new features or product enhancement we release every month are based on the feedback we received from our customers. 

For additional information about our current enhancements and innovations, feel free to visit our site at https://quickbooks.intuit.com/au/product-updates/. 

Feel free to post again if you have any other questions, michael-green. Have a nice day!