Hi There,
I am having expert level experience in QuickBooks Online integration. I have experience in all most all the modules in QBO like Invoice, Estimate, Refund Receipt, Customer, Chart of Accounts, Product and Services, Sales tax modules etc.
I am very much familiar with their API explorer and the .NET SDK provided by Intuit.
Please let me know your convenient time to discuss further on this.
Kind Regards,
Mayuri Patel.