Thanks for reporting back, @jwilson.

I can see the urgency of getting your Billing & subscription page error resolved. Let me help route you to the best support who can investigate this matter and provide the appropriate fix so you can update your card information for your QuickBooks Online (QBO) subscription accordingly.

Since your Billing & subscription page error continues, even after performing the recommended troubleshooting steps above, I encourage you to reach out to our Technical Care team. The Community is a public forum, and we'll need to collect some personal information to pull up your account. They can create a case to investigate your page error and guide you with a fix. Here's how:

1. Sign in to your QBO company.
2. Go to the Help (?) menu.
3. Select the Search tab.
4. Click the Contact Us button.
5. Enter a brief description of your concern in the What can we help you with? field.
6. Select Continue.
7. Choose a way to connect with us (Send a message or Get a callback.

Once everything is all set, you may also want to check out this article as your reference to guide you in managing your QBO account and subscription: Account Management.

If you have other account management concerns in QBO, I'm always ready to help. Take care, and I wish you continued success, @jwilson.