QuickBooks Online Sync Error: Business Validation Error: You can't delete this account because it is part of the Online Banking feature.
Why the Sync Error occurs
This error occurs when a deleted account in PayMaker is trying to sync to QuickBooks Online (QBO), but the account is one of the special accounts QBO needs to operate, such as like __Uncategorized Income __and Uncategorized Expense.
How to Fix the Sync Error
These accounts cannot be deleted or edited in QBO. The only options are to re-activate the deleted account in PayMaker or to contact Customer Support to clear the error.