How do I apply multiple payment methods to "receive Payment"? ie, partial payment in cash, partial on credit card, sometime on two cards, etc?

Pleased to see you here, @annette.sales.

Welcome to the Community! I'd be delighted to share some steps on how you can use multiple payment methods in receiving payments in QuickBooks Online.

You can accept and record multiple ways in receiving partial payments from your customer. However, you have to apply it one at a time. Here's how:

1. Go to Sales.
2. Choose Invoices tab.
3. Look for the open invoice.
4. Click Receive Payment on the Actions column. 
5. Choose the Payment Method.
6. Enter the specific partial amount to be paid on the invoice. 
7. Put a check mark on the Invoice to be paid.
8. Click Save and Close. 
9. Just repeat the same process in applying the rest of the partial payments using different methods.

That should do it! Don't hesitate to visit us here in the Community if you have other questions about receiving payments in QuickBooks Online. I'm always here to help.

It is more than 3 years since this query was raised and still QB have done nothing. 

Furthermore the responses you get from the moderators are robotic completely ignoring the original question. 

In pure plain simple english it is very clear that 'Sales receipts' cannot accept 2 different methods of payments. Therefore the only workable solution is to create an 'Invoice' and then post post after the invoice has been created. 

As others have indicated this is another example of a no-brainer function that should be implemented. 

I know, I sound very frustrated - because I am! - the potential for QBO is there but there are ZERO technicians working on anything to continously improve this program. The amount of issues I've raised/reported/provided feedback and nada, zero, nothing. 

It's clear, accept the product as it is or move on to others like Odoo, Sage etc