Where is Export to QuickBooks Online option when converting from QuickBooks Enterprise Solutions

Import Into Quickbooks Online From Quickbooks Enterprise
QuickBooks Help
Moving your file from QuickBooks Enterprise Solutions to QuickBooks Online? This step-by-step visual guide will help you do it…

To get “Sign into QuickBooks Online” screen open:
From the QuickBooks Enterprise Solutions screen > Press Ctrl+1 to open the Product Information window > Once opened, press Ctrl+b+q > Click OK to close the Product information window.
Look for this screen to open:
https://intuitcorp.quickbase.com/up/bfwy8i23w/g/rzx/eg/va/1.png

This applies to the US version only.

Also, see these related articles
Overview Guide Import To Quickbooks Online From Quickbooks Desktop
Import Into Quickbooks Online From Quickbooks Desktop For Windows (Us Only)
Condensing Your Quickbooks Desktop File For Import To Quickbooks Online