Why the invoice paid date (4/23/24) is prior to the invoice created date (4/28/24) in QuickBooks? Therefore, invoice reads paid in full although it hasn't been paid?

There are two chances why there are differences between your invoice date and payment date, Helen. Let me share some information with you. 

In the first scenario, the date from your bank statement remains as it is, even if you match an invoice created after the payment. The second scenario is if you recorded the payment manually on your QuickBooks Online, there is a big possibility that the date was wrong. 

We need to edit the date recorded on the invoice or payment. However, if this invoice is still unpaid, we can unmatch the invoice and the payment for it to show as unpaid or open balance. 

Let me guide you on how to unmatch the transactions downloaded from the bank: 

1. Go to Bank transactions.
2. Select Categorized.
3. Find the payment.
4. Select Undo. 

Moreover, let me share these articles that you can check and can help you manage your invoices and payments: 

• Record a customer refund in QuickBooks Online
• Customize invoices, estimates, and sales receipts in QuickBooks Online
• Send invoice reminders automatically or manually in QuickBooks Online

Let me know if you still have questions about your invoices. Have a lovely day, and take care.