Hello, katconte13.
Thank you for taking the time to visit the Community. I can show you how to update the card on file for your QuickBooks Online subscription.
This can be done directly through your QBO account. Here's how:
1. Click the Gear icon in the top right corner.
2. Select Account and Settings.
3. Choose the Billing & Subscription tab.
4. In the top section, click Edit beside of Payment Method.
5. Enter the new card information, and select Save.
The next monthly charge will be debited from the new card. I wish you and your business continued success. Please let me know if you have any other questions.