Hi there, @dannyt3. I'll provide information about this below.
To begin with, the option to delete a payment in QuickBooks Online (QBO) is unavailable due to transaction history purposes. However, you can set the payment method to inactive. Here’s how to do it:
- Navigate to the upper right corner and click on the Gear icon or Settings.
- Under the Lists section, select All Lists.
- Choose Payment Methods and click the dropdown icon next to the payment method you wish to make inactive.
- Finally, click Make inactive.

For more detailed guidance, you can check this article: Add, edit, or disable a credit card.
Additionally, you can refer to this resource for updating your credit card details, making changes to your subscription, or viewing your billing history: Manage billing, payment, and subscription info in QBO.
If you need further assistance with managing your payment method, please feel free to reply below.