Post 1 payment against multiple customers with multiple invoices

Happy to help, @andrew-amaladvoc. I hope you're having a great day so far.

Glad to provide steps on how to post one payment against multiple customers with various invoices in QuickBooks Online (QBO). 

If the payment is from your online banking, you can click the Find other matches in the For Review tab and pick the appropriate transactions. See the sample screenshots below for your guidance. 

You can record a single payment for one customer for several invoices. But if multiple customers have different transactions, you're unable to do so. 

Here's how: 

1. Go to the +New menu on the top and choose Receive Payment. 
2. Select the customer name in the drop-down. 
3. Complete the Payment method, Reference no, and Deposit fields. 
4. Check all the outstanding transactions for that customer. 
5. Click Save and close. 

For more information, see this link: Record invoice payments in QuickBooks Online.

Additionally, check out these articles below on how to combine multiple transactions into a single record and other related matters: 

• Record and make bank deposits in QuickBooks Online
• Sales and customers

You can always notify me if you have any other QuickBooks questions. I'm a few clicks away to help. Have a good day, andrew-amaladvoc.