How do I split a payment into several nominal ledger account expenses

Hello, ingridd. 

Thank you for reaching out to the Community. If you're referring to splitting payment into multiple expenses account from downloaded bank transactions, we can use, the split feature from the banking tab. From there, you can categorize into different expenses.

Please see the screenshot below: 

However, if you are referring to the added transactions, you can use Journal Entry to split the single payment into several expenses account. But, I suggest reaching out to your accountant to ensure your book is recorded accurately. 

For more details on how to create a Journal entry, please refer to this article: Create journal entries in QuickBooks Online. 

Get back to me if you need further help with this, I'm just a post away. Have a great day!