How many parents can a sub-customer have in QuickBooks Online?

In QuickBooks Online, a sub-customer can have only one parent. This structure facilitates organization within the customer hierarchy, allowing users to connect sub-customers to a specific parent entity for better management of transactions, billing, and reporting. Having a single parent also maintains clarity in financial data, helping businesses track income and expenses associated with each customer relationship effectively.

The other options suggest a varying number of parents, which deviates from the functionality designed within QuickBooks Online. This limitation ensures that the reporting is straightforward and that relationships between customers and sub-customers remain clear and unambiguous.