Thanks for chiming in on this thread, tnich1960. I'd like to provide details about deleting a transaction during reconciling your accounts in QuickBooks Online (QBO).

If you're currently reconciling your bank account and the duplicated transaction is already in the previous or current month, then it will not affect the ending balance of the current month and the beginning balance of the following month.

However, it will affect the ending balance of the month and the beginning balance of the following month if the transaction's date of the duplicated entry is within the next month.

Furthermore, check out this article to learn more about how you can effectively manage your income, expenses, and any possible errors accordingly: Learn the reconcile workflow in QuickBooks.

Keep me posted if you still have questions or concerns with managing your bank transactions QBO. I'll be here to lend a helping hand. Have a great day ahead!