What does the exclamation mark next to invoice status mean?

Thanks for reaching out to the Community. I want to share information regarding the invoice status symbol you mentioned.

The symbol with a yellow circle around the exclamation mark indicates that the invoice is overdue. Here's a clear example in the screenshot I’ve provided below.

To help you better organize your invoices, you have the option to categorize them based on their status. You can do this by clicking on the Status dropdown and choosing the relevant category. Also, when you click on the invoice' status, and a tab will appear showing whether the invoice is Open, Paid, or Deposited.

For additional information, refer to this helpful article: Create invoices in QuickBooks Online.

To save time in the future, you can personalize the appearance and layout of your sales forms. You can refer to this helpful reference: Customize invoices, estimates, and sales receipts in QuickBooks Online.

If you have any further questions about invoices, please don’t hesitate to reach out through this thread. I’m just a comment away and happy to assist you further.