DON’T USE A LIVE COMPANY FILE FOR TESTING.
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Syncing with QuickBooks Online will require registering on https://letsynconline.com/
Connecting QuickBooks Online Company File to LetSync Online: Read More
Add QuickBooks company file to LetSync Desktop: QuickBooks Online company file: Read More
Authorization Code: Read More
Download link: https://www.letsyncsolution.com/letsyncdesktop.msi
Adding a new database from LetSync Desktop: https://www.letsyncsolution.com/docs/adding-databases/
Adding new tasks: https://www.letsyncsolution.com/docs/adding-tasks/
Running a Task: Read More