I need to update cc# for payment but your system won't accept the new info

Thanks for posting here, steinviolins.

To clarify, are you trying to update the credit card information for QuickBooks Payments? If so, you can follow these steps:

1. Sign in to the Merchant Service Center.
2. From the Account drop-down menu, select Login & Merchant Accounts.
3. Click Change your User ID, Email, and Password.
4. Click Sign in & security, then update the needed account info.

Otherwise, reach out to our Merchant Service Team by following the instructions here: Contact Payments Support.

To change the credit card or account you use to pay for QuickBooks Desktop and services like payroll, here are the steps:

1. Sign in to camps.intuit.com
2. Find your app or subscription in the Products & Services > Details.
3. In the Billing Information section, find Payment Method, then select Edit.
4. Update your information and then click Save and Close.

I've got this article for reference: Change your QuickBooks Desktop payment method.

Please let me know if you're able to update the account information. I'm here to help you out again.