I want you to make an application in Delphi XE 10.2 that will generate an invoice in Quickbooks Online. Doing a sample in one of their sandboxes is OK as I will transfer the logic to my application using real information.
Good day,
I can help you. but this is more complicated task.
For real work necessary to have form to create tokens and save them somewhere to avoid asing password every time. And for order neceesary to add customer.
I have REST for QuickBook in Delphi but before start we have to discuss about your business processes and which information you should send except order.