How do I change an already reconciled account? I need to delete transactions and add other ones.

I got your back, @marcuscluckey-gm.

Welcome, and thanks for dropping by the Community. I can provide details about changing a reconciled account in QuickBooks Online (QBO).

To change or undo a transaction on a reconciled account, all you need to do is to remove its R (reconciled) status in the register. Please refer to these steps on how:

1. In QBO, go to the Accounting menu at the left pane.
2. Proceed to the Chart of Accounts tab.
3. Locate the account, then tick View register under the Action column.
4. Select the transaction you want to unreconcile to expand the view.
5. In the checkmark ✔ column, select the box with the “R” until the box is blank. This removes the transaction from the reconciliation. 
   
6. Hit Save.

Once done, you can now delete or edit the transaction by double-clicking it.

For more information about changing a reconciled account, please check out this article: Undo or remove transactions from reconciliations in QuickBooks Online.

Once you're ready to reconcile again, refer to this article for further guidance: Reconcile an account in QuickBooks Online.

For tips and other resources, I recommend visiting our website for future reference: QBO self-help articles.

If you need further assistance with reconciling account or anything else in QBO, please let me know in the comment section below. I'm always ready to help. Take care and have a good one.