I forgot to enter oppening balance for my mc statement to reconcile. How do I change this?

Hi there, qboaccountant.

If you forgot to enter an opening balance when you created the account. You can go back later and create a journal entry to record it. 

Here's how:

1. Select + New or + Create.
2. Select Journal entry.
3. Enter a date that comes before the oldest transaction in the account. This will be the opening balance date.
4. In the first row under the Account column, select the dropdown menu to choose the account you want to enter the opening balance for.
5. Add a note in the Description field so you know what the journal entry is for.
6. In the second row under the Account column, select the dropdown and choose Opening Balance Equity.
7. Use your bank statements to enter the opening balance. 
8. When you're ready, select Save and close.

Then mark the journal entry as reconciled. Here's how:

1. Find the account and select Account history from the Action column.
2. Search for the journal entry you just created. Select it to expand the view.
3. Select the box in the checkmark column until you see an R. This reconciles the journal entry.
4. When you're done, select Save.

Click on the link for more information: What to do if you didn't enter an opening balance in QuickBooks Online

Hence, if you have reconciled it already and forgot to enter the opening balance. All you have to do is to undo reconciliation then reconcile again. Do not forget to enter the opening balance.

Here's how to undo reconciliation:

1. Find and open your customer's QuickBooks Online company.

When you're in their company file:

1. Follow this link to complete the steps in product.
2. Select History by account.
3. Select the account you want to reconcile and date range from the dropdowns.
4. Find the reconciliation on the list.
5. Select View report to open the Reconciliation report.
6. Review any discrepancies and changes your client wants to make.
7. When you’re ready, select the dropdown ▼ in the Action column, and then select Undo.
8. Select Yes and then Undo to confirm.

If you don't see Undo, make sure you've opened your client's company file from QuickBooks Online Accountant.

Please click on the link for more information about how to undo reconciliation: Undo a client’s entire reconciliation in QuickBooks Online Accountant

If you have any additional questions, please don’t hesitate to reach out. We're always here to assist you!