Thanks for joining this thread, Carolina Gonzalez.

I want to make sure you're able to match customer payments in your QuickBooks Online account.

Since the troubleshooting steps mentioned above didn't do the trick I recommend reaching out to the QuickBooks Online Support Team. Agents have specialized tools, like the ability to share your screen, to take a closer look to determine what's causing the issue with the invoices. They'll also be able to escalate the issue for you if need be. Here's how to get in touch with the team:

1. Click the Help (?) button.
2. Select either tab to get started:
  - Assistant: Get quick, personalized answers. Select a suggested option, or type a question or topic you need help with. If you decide you need further help, you can still Talk to a human.
  - Search: Search the QuickBooks Online knowledge base directly, or select Contact Us and choose a way to connect with us:
    a. Start a chat with a support expert.
    b. Get a callback from the next available expert.
 

The following article provides these steps if you ever need them again in the future: QuickBooks Online Support

Please don't hesitate to drop a comment below if you have any other questions. The Community always has your back!