How can I find errors so that I can correct bank balance to quickbooks balance discrepencies

Hi there, 

You've reached the right place for help. I'd be happy to share more info about correcting bank balances in QBO.

If you're going through the reconciliation process I'd like to share info on what causes discrepancies:

•     Previously reconciled transactions have been modified, deleted, or added
•     Reconciliation adjustments (Journal entries, etc.)
    

Depending on the cause, follow these steps to fix reconciliation discrepancies:

Modified, deleted, or added transactions

There are several reports available in QuickBooks that will help you identify discrepancies.

Reconciliation Discrepancy Report: This report shows transactions sorted by statement dates that were changed since the last reconciliation.

1.     From the Reports menu, select Banking and then Reconciliation Discrepancy.
2.     Choose the appropriate account, then select OK.
3.     Review the report to identify any discrepancies.                                    

Missing Checks Report: This report helps you verify missing transactions.

1.     From the Reports menu, select Banking and then Missing Checks.
2.     Choose the appropriate account, then select OK.
3.     Review the report for transactions that don't match your bank statement.                               

For further information on how to correct the bank balance, I encourage to check out this helpful article: Fix Reconciliation Discrepancies. Let me know if you have further questions. I'll be here to assist. :)