If you notice that the invoice number from Zahara is not being exported to QBO, it is simply due to a setting in your QBO system being disabled.



To allow Zahara to push the invoice number into QBO, you need to enable “Custom Transaction Numbers” in the Sales section of QBO. Use the following steps to enable this feature:
Step 1: Head to Your Company>Account and Settings:
Step 2: Head to Sales and Edit the “Sales form content” settings:
Step 3: Enable “Custom transaction numbers” and select Save.
With this turned on, the invoice number in Zahara will be exported to QBO.