In the Customer table, you will find there are two fields referring to the customer's balance.
Balance: The balance of the customer.
Total Balance: The balance of the customer including the balance of its sub-customers.
NOTE: This is only for Method accounts syncing to QuickBooks Desktop. Total Balance is not used for those syncing to QuickBooks Online.
In the below example, Crenshaw Construction has the sub-customer of Bob's Job.
Crenshaw Construction has a Balance of $100.
Bob's Job has a Balance of $100.
Crenshaw Construction has a Total Balance of $200.
Crenshaw Construction Balance ($100) + Bob's Job Balance ($100)
Bob's Job has a Total Balance of $100. The total balance of a sub-customer does not include its parent.