Hello there, billy-joe.
Make sure you have QuickBooks Online Payments to get the option that allowed customers to pay online. Visit this link for more information.
Once done, you can refer to this article to learn more about processing payments: Take and process payments in QuickBooks Online.
You might also find this article helpful about recording payments to credit cards: Record your payments to credit cards.
If you have other questions on future tasks, feel free to access our Help Articles.
Keep in touch if you need any more assistance with this, or there's something else I can do for you. I've got your back. Have a good day.