When splitting a bank transaction in Quickbooks Online, the customer field is now missing in the split so I cannot assign a different customer to each split.

Hello there, nancy.

It appears to me that this is a duplicate post, and I've already provided a response in another thread. You can refer to this link for more details: https://quickbooks.intuit.com/learn-support/en-us/reports-and-accounting/when-categorizing-bank-transactions-the-customer-field-is/01/1371416#M205861.

You can post again if you have other related issues or concerns. We're here to help you.