how to untick bulk items selected for bank reconciliation but have not been actually reconciled on quickbooks online

You're in the right place, @dorothy5.

I'm here to share some ways on how to untick selected bulk items on the Reconciliation page.

Simply follow the steps below: 

1. Go to the Gear icon.
2. Choose Reconcile under Tools.
3. Under the Account dropdown menu, select your bank.
4. Click the Circle option under the Print icon.
   
   
5. Choose Yes, select All. 
   
   
6. Lastly, select again the Circle option to untick all transactions.

I've also added a link to give more insights about reconciling accounts in QuickBooks Online.

Reach out to me directly if you have additional questions about reconciliation. I'm here to answer them for you. Have a good one.