How to manually add a charge to a credit card account?

I've got you covered, @naturf.

You can simply create an expense transaction to add a charge to your credit card account. I'd be happy to guide you through the steps.

1. Click the + New button, then select Expense.
2. Choose the payee from the drop-down.
3. Select the payment account and the payment method.
4. From the Category section, choose an expense account for the credit card charge. If you don't have it, you can create one by clicking + Add new and named it as Credit Card Charges.
5. Enter the amount and the necessary information.
6. Click Save and close.

I'm adding this article for more guidance: Enter and manage expenses in QuickBooks Online.

As always, you can visit our QuickBooks Community help website if you need tips and related articles in the future. 

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.