How do.you charge a customer with a card on file and email them a reciept

Hi usercommandaclean,

Welcome to the Community! Having the ability to save customer credit card information within QuickBooks Online allows you to process credit card payments quickly and with ease. Now that you have your customer's credit card information saved to their profile, I can explain how to process a payment for them. 

The steps will differ slightly depending on if you're creating an Invoice or a Sale Receipt. I'll walk you through the steps for accepting a payment towards an invoice: 

• Navigate to the + New button.
• Select Receive payment.
• Choose the customer from the dropdown menu and fill in the payment date. 
• From the Payment method drop-down menu, select Credit card.
• Here you would normally be prompted to enter the credit card information, but since you already have it on file for the customer, you just need to tick the Process credit card box. 
• In the Outstanding Transactions section, select an open invoice to apply the payment to.
• Once you're finished entering all the necessary information, select Save and send to email a copy of the payment receipt to your customer.

This will trigger the credit card payment to be processed to the saved credit card. You can learn more about processing invoice payments and sales receipts in this Community article: Process a credit card payment in QuickBooks Online

Please don't hesitate to reach out if you need any further assistance!