QuickBooks 2013 and older: Transactions downloaded from a financial institution may not always match the register in QuickBooks, or you may not want to add certain transactions for a variety of reasons. The steps are essentially the same for deleting duplicate transactions.
Important: If you are using QuickBooks 2014 or later, please see the Using Bank Feeds (Online Banking) in QuickBooks 2014 article.
Intuit recommends 2 ways to do this, depending on which view you are using.
Note: If you know that QuickBooks is correct and want to delete the transactions that do not match, you must delete the entire statement after matching the appropriate transactions.
Note: Deleting the statement will prevent the unwanted transactions from appearing the next time you download a statement. If you do not delete the statement, the transactions that were not matched will always appear.
Note: If you're finished matching your statement, you can select Select all downloaded transactions older than and set the date to the last statement end date, then click Delete Selected. If you're unable to delete all transactions, switch to Register mode to delete the statement.
If this information does not resolve your issue, you can read discussions and post messages and questions relating to your issue on the Intuit QuickBooks Community site for free, or you can contact a technical support agent for additional guidance. Fees may apply.