You can update your payment card using the method option in the bill pay section, @Andy2050. I’d be happy to guide you through the process below.

Here's what you need to do:

1. Go to the Vendors menu and select Pay Bills.
2. Tick the boxes you want to pay the bills.
3. Click the Method dropdown below and pick the payment method you want.
4. Choose an Account for the credit card.
5. Once done verifying all details, click Pay Selected Bills. 

For more detailed information, refer to this article: Pay bills in QBDT.

You can also check this resource to help add, save, or update your customer's credit card information: Add, edit, or disable a credit card.

If you have any questions about changing the payment method, please tag me in the comment section, @Andy2050. I'll assist you in any way possible.