When a customer pays what happens

I've got you covered, @sophs816-icloud-.

When your customer pays their invoices, you can proceed on recording the payments in your QuickBooks Online (QBO). Here's how:

1. Sign in to your QBO account.
2. Click the + New button, then select Receive Payment.
3. Select the customer from the drop-down.
4. Enter the payment date and select the payment method.
5. In the Outstanding Transactions section, select the checkbox for the invoice your recording payment for.
6. Click Save and close.

I'm adding this article for more details: Record invoice payments in QuickBooks Online.

Just in case you want to learn more about creating, sending, and customising invoices, you can read this article for the detailed steps and information: Create invoices in QuickBooks Online.

Keep in touch if you need any more assistance on recording customer's payments in QBO, or there's something else I can do for you. I've got your back.