How to change a different Credit Card

Hello there, shiv1.

I'm here to make sure you're able to change your credit card in QuickBooks Online successfully.  

I've outlined the steps below:

1. Click the Gear Icon.
2. Go to Account and Settings.
3. Select Billing & Subscription.
4. Enter the credit card information. (Card number, name on card, expiration date, and security code.) 
5. Make sure to verify the billing address in QuickBooks Online is the same billing address on the credit card statement.
6. Tap Save Changes.

Also, check this article to has detailed information on how to update credit card information in QBO.

Keep me posted if you're now able to change your credit card in QBO. I'm always here to help you more.