I can show you how to do that, QST.

After adding your customer's credit card information, you'll need a QuickBooks Payments account to process credit card, debit, and ACH bank transfer payments in QuickBooks Online. You can read this article to be guided in creating your account: Sign up for QuickBooks Payments.

Then, you'll have to choose where to record your payments and fees. Once you're all set up and ready, it's time to charge your customer's credit card by receiving invoice payments or creating sales receipts. Feel free to follow the simple steps below.

Receiving a payment:
 

1. Click the + New button, then choose Receive payment.
2. Enter the necessary information
3. From the Outstanding Transactions section, select an open invoice to apply the payment toward. 
4. From the Payment method drop-down menu, choose Credit card.
5. Select Enter credit card details.
6. Enter the credit card information or select Swipe Card.
7. Select Process credit card.
8. Click Save, then Save and close.

Creating a sales receipt:

1. Click the + New button, then choose Sales receipt.
2. Enter the necessary information.
3. From the Payment method drop-down menu, choose Credit card.
4. Select Enter credit card details.
5. Enter the credit card information or select Swipe Card.
6. Select Process credit card.
7. Select Save, then Save and close.

Additionally, you may let your customers pay you at their convenience by sending them an online invoice.

I also encourage reading this guide to learn how to check when QuickBooks deposits customer payments into your bank account.

Do you have any other questions in mind? Feel free to leave them below and I'll get back to you as quickly as I can. Have a pleasant day ahead.