You'll get the Error Code:-81624,type: INVALID_REQUEST when the payment authorization failed. It's possible that the address invalid or the details you've entered is not matching with the financial institution.
You can reach out to your credit card provider to verify the bank details. Then, enter the information again in QuickBooks by following these steps:
Go to the Gear Icon > Account and Settings.
On the left panel, click Billing & Subscription.
Enter the credit card information. (Card number, name on card, expiration date, and security code.)
Make sure to verify the billing address in QuickBooks Online is the same billing address on the credit card statement.
If you're still unable to update the credit card information for your subscription, I recommend contacting our Customer Care Team. They can pull up your account and help you update the bank information.
Click the Help icon located in the upper right-hand corner.
In the Help window, click the Contact Us button located at the bottom.
Enter your question and click Let's talk.
Choose either Start a chat or Call us.
For the new QuickBooks Assistant help update, you can follow these steps:
Go to the Help menu, and select Talk to a human.
Choose Talk to a human again.
Proceed with I still need a human.
Click the Contact us link.
Select either Start messaging or Get a call.
Please feel free to get back here if you have any additional questions or other concerns. I'm always around to help. Thanks.