Hi there, @ana-propster-tec.
Thanks for dropping by the Community page. I want to make sure you’re able to add your credit card information in the Billing & Subscription tab.
To start with, make sure to open QuickBooks as master or company admin to make changes on the billing and subscription settings. Then, follow these steps to add the card details:
To learn more about adding or updating billing, payment, and subscription info in QuickBooks Online, you can check out this article.
Just in case you're still unable to add the card when logging in as a master admin, I would like to know the error message you've received. This way, I can gather enough resources and share with you the right amount of information.
If your account is in the wholesale billing plan, your accountant will be the one reliable for the charges. For additional details, you can open this link.
Let me know if you have any other QuickBooks or billing questions. I'm a few clicks away to help. Thanks for coming, keep safe!