Hello there, lihong89tan.
I understand your frustration with the limitations of bill and supplier credit features.
QuickBooks Online (QBO) Simple Start doesn't include the bill feature, which may limit the ability to track and accurately record payables. Consider upgrading to a higher version of QBO for better payables management and accurate financial recording.
Additionally, the journal entry you created as a credit note will not apply as payment, so it will still show as overdue.
To understand more about Intuit pricing and plans, see the below articles:
Furthermore, I've added a link to help you work with QuickBooks: Expense and Suppliers.
If there's anything else you need help with entering credits, let me know by commenting below. I'll be more than happy to help.