How do I match a split payment to a specific person and invoice?

Let's record these transactions, @Binnie. 

We can create a lump sum deposit for multiple invoices payments to match these payments and invoice. 

Here's how: 

1. Go to the + New button and select Receive Payment.
2. Choose the customer and enter the Payment date.
3. Enter Undeposited Funds in the Deposit to field.
4. Select the invoice you want to pay, and click Save and close.
5. Do this to the other invoices you want to include to the deposit. 

After paying the invoices, we can now create a lump sum deposit:

1. Go back to the + New button and choose Bank Deposit.
2. Select the bank account in the Account field.
3. Add all the necessary information.
4. Under the Select the payments included in this deposit section, select the invoice payments.
5. Make sure the total deposit amount and the amount you received matched.
6. Click Save and close.

Check these articles for more information:

• Record invoice payments in QuickBooks Online

• What’s the Undeposited Funds account?

Let me know if there's anything else that I can help you with. I'm always here to assist. Have a great rest of the day!