When categorizing bank transactions, the Customer field is missing. I have tried looking at the same thing via different browsers and also clearing my cache.

Hi there, nancy. 

I've noticed that you've posted twice in the forum about managing your split transaction. I'm here to help you out. 

Since you've performed some basic troubleshooting steps but still with the same result, we can also ensure that the Track expenses and items by customer option is turned on.
 

However, if the issue persists, I recommend contacting our support team. They have the resources to determine why you were unable to add a customer to your split transaction while ensuring your personal information remains secure.  

Here's how: 

1. Go to the Help (?) icon.
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 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:
• Start a chat with a support expert.
• Get a callback from the next available expert.

You can check out their support hours to determine their availability.

 
Also, I've added this guide about how you can speed up the process when categorizing your bank data: Set up bank rules to categorize online banking transactions in QuickBooks Online. 

If you have follow-up concerns about bank transaction management, comment below. I'll be here to lend a hand. Take care!