Can be able to access my customers' account?

I'll make sure you'll be able to access your customer's account, Joyce.

Let's rule out a possible web browser cache issue and access your QuickBooks Online (QBO) in a private or incognito window. Too much cache data stored from your browser causes unusual behaviour that affects the performance of your account.

Using a private window helps us verify the issue as this doesn't save any cache files. To open a private window, you can utilize these keyboard shortcuts keys depending on the browser you're using: 

• Ctrl + Shift + N for Google Chrome browser
• Ctrl + Shift + P for Mozilla Firefox & Microsoft Edge browsers
• Command + Shift + N for Safari browser

 If you’re able to access your customer's account, I’d propose clearing your regular browser's cache to refresh the system and start with a clean slate. If the issue remains, I recommend using other supported browsers. This way, we can check if this is a browser-integrated issue. 

In addition, I've added this link that serves as your guide in case you need to merge your customers and refund them: 

• Merge duplicate accounts, customers, and suppliers in QuickBooks Online
• Record a customer refund or supplier refund in QuickBooks Online

You always have my attention whenever you need help accessing your customers' accounts. You can also add in your response if you have any QuickBooks-related concerns. I'm always around ready to back you up!