Hi there, Mak Mashal.
Welcome to the QuickBooks Community. I can share details to ensure you're able to fix the reconciliation discrepancies.
When you open the Reconciliation window and choose an account to reconcile, the Beginning Balance is zero or incorrect. This may be due to one of the following reasons:
- Duplicate transactions.
- The transaction was associated with a different bank account.
- Previously reconciled transactions were modified or deleted.
- Incorrect opening balance or account
I suggest reviewing your previous period's reconciliation to determine which of the above-mentioned is causing the error. This will help us determine whether the opening balance for the current period is correct. You can follow the steps in this link: Fix beginning balance issues if you've reconciled the account in the past QuickBooks Online.
Please refer to this article to view various information or guidelines you need to help to fix any reconciliation issues and how it works: Learn the reconcile workflow in QuickBooks.
Let me know how it goes in the comments below. If you have other banking concerns or inquiries about reconciling your accounts in QuickBooks. I'm just around to help. Take care always.
