How do I delete my bank account details.

Hi wendykelly-

You can disconnect your bank which will delete the account details from your QuickBooks Online account. We should be able to to disconnect this by following the steps below.  

1. Select Banking from the left-hand menu
2. Select the Pencil icon on the card for the bank you wish to disconnect
3. Tick the box Disconnect this account on save
4. Select Save and Close

Reply here if you have any questions or clarifications. 

-Christine