We can delete your transaction in the Chart of Accounts, Miller.
Before doing so, please ensure your checking account is disconnected in QuickBooks.
To fully remove it, you can set it to Make inactive in the View Register tab.

Here's the process for deleting your transactions.
- Navigate to Settings and click on Chart of Accounts.
- Locate the transaction you want to delete.
- Click Delete to complete.
For more details on excluding transactions in QuickBooks Online(QBO), please refer to this article: Disconnect accounts connected to online banking in QuickBooks Online.
Please reply to the forum if you have additional questions regarding excluding your transactions.