Problem with Reconciling (Invalid Date)

We appreciate you for posting your concern here in the Community. Let me help you regarding your deleted reconciled entries inside QuickBooks Online (QBO).

In QBO, it's essential to note that once you delete a transaction, you won't be able to mark it as reconciled. If you've encountered an invalid date notification when trying to reconcile a transaction, you've likely reconciled the wrong transaction in the chart of accounts. To fix this issue, you can recreate the deleted entries by referring to the transaction details in the Audit Log. Here's how:

1. In the Gear icon, under the Tools, click the Audit Log.
2. From the Filter dropdown, decide the correct user, date, and events and look for the deleted transactions.
3. On the History column, select View.
4. Re-create the transactions based on the details in the Audit Log.
5. If done, change the reconciliation status in the register to "R" for the Reconciled.

For more information about fixing some issues when you reconcile, visit this link for further guidance: Undo or remove transactions from reconciliations in QuickBooks Online.

You can always depend on us for further questions in reconciling an account in QBO. Have a great one!