QuickBooks Online sync error: We're sorry. This feature is not included in your QuickBooks Online Essentials subscription
Why the sync error occurs
This error occurs when using features in Key CashFlow that QuickBooks Online (QBO) Essentials subscription doesn't support, such as billable expenses and class tracking.
How to fix the sync error
To use those features in Key CashFlow and sync to QuickBooks Online, upgrade to QuickBooks Plus. Contact Intuit to determine the subscription needed to sync with Key CashFlow based on the features needed.
Alternatively, don't use the features in Key CashFlow that aren't supported by the QuickBooks Online Essentials subscription.