- Creating an Invoice from an Estimate is not something that is allowed through the API. This is why there is no stock functionality for this. As there is in Classic, there is still the option to make a Method-only solution for this.
- Sales Order are not actually part of the work flow in QBO. They are only available in QuickBooks for Desktop. I believe the app shows due to it being part of desktop. This is something we will clean up so that QuickBooks Onlline users won't see apps and screens that are not available for their versions of QuickBooks.
- The Google Calendar connectivity is coming. Its in our pipeline, unfortunately I don't have an ETA.
- The Scheduling and Invoicing app is also in the pipeline. Again no ETA, but it is definitely part of the plan for Method:New.
I hope this answers you questions. Please keep the feedback coming!
Manager of Support