How do I delete a linked credit card account in quickbooks online?

Hello, 

Thanks for contacting us with your question. I'm here to help you make the most of your QuickBooks Online account!

If you connect an account to online banking, QuickBooks downloads your recent transactions automatically. There's two ways to remove an account from QuickBooks Online: disconnecting from the Bank Feed, and deleting the account from the Chart of Accounts. 

Take a look at this Community article to see the differences between disconnecting an account, and deleting an account: Disconnect or delete an account from the Downloaded Transactions page.

To disconnect an account from the Bank Feed, follow these steps: 

1. From the left navigation menu, select Banking.

2. In the Account window, select Disconnect this account on save.

2. Select Save and close.
 

To delete an account, follow these steps: 

1. Click Accounting icon on the left navigation menu and choose Chart of Accounts.
2. Find the account you want to delete in the list.
3. In the Action drop-down, select Make inactive.
4. Select Yes to confirm.

That's all there is to it. I hope this helps. Let me know if you've got any other questions.

Cheers!