Why can I not update my credit card information? When I try it tells me to check in as Carolyn Parker which is how I log in.

I know another way on how you can update your credit card information, dppc1.

When updating your billing information in QuickBooks, only the master admin or company admin can update the credit card information on file. Since you log in as one of these users, we can try updating the billing information using the Customer Account Maintenance Portal (CAMPs) page.

Here's how:

1. Log in to your camps.intuit.com account.
2. In the Products & Services list, look for your app or subscription. 
3. Choose Details.
4. Find the Payment Method in the Billing Information section.
5. Hit Edit and update your credit card.
6. Tick Save and Close.

To learn more about using CAMPs, you can check out this article: What is CAMPs and how do I use it?.

Once done, go to the Account/Billing Information page in QuickBooks to see the updated billing information.

Here's how:

1. Go to Employees on the top menu.
2. Choose My Payroll Service.
3. Hit Account/Billing Information.
4. Sign in using your Intuit Account login.
5. Tap Billing Detail to see the updating credit card information.

For more details about updating your credit card for payroll billing, just refer to this article: Change your credit card for payroll billing.

I've got a link here where you can find articles about managing your account: Account management gathers topics for your Intuit Account and subscription management.

I'm just one reply away if you need a hand with updating business information or any QuickBooks related. Have a great day ahead.