You can go to your bank register to identify duplicates, nothingsimpleg1. Let's go over some details to help you reconcile your account in QuickBooks.
Your Chart of Accounts register shows all your transactions. Both are added manually and some come from your downloaded transactions in the Banking menu. To identify the duplicates, you can check your bank register and review transactions that are added twice. These transactions have the same date, amounts, and details.
In case, you'll undo all the transactions, it will double your income if you remove the manually matched ones. To remove duplicate transactions in the bank register, you can follow the steps shared by my colleague above.
After you remove the duplicates, you can reconcile your accounts by following this article: Reconcile an account in QuickBooks Online.
I'll include these resources as a guide. They will help you run a reconciliation report to review your reconciled transactions. You'll use it to fix issues for accounts you've reconciled in the past in QuickBooks Online:
If you need more help with account reconciliation, just comment below. I'll respond promptly. Take good care.
