Hello there, @Delmer.

I'm happy to let you know that you can delete a batch of transactions in QuickBooks Desktop. And I'd be glad to help you with this.

First off, we'll need to have a backup file before you delete the transactions. To create a backup file, you can read through this article for the detailed steps and information: Create Backup of the QuickBooks Desktop Company File.

After creating the backup file, you can go to the Banking page and delete the transactions from there. Here's how:

1. From the menu, select Banking.
2. Choose Bank Feeds, then select Bank Feeds Center.
3. In the Items Reviewed section, select the name of the account.
4. Select the Select Items to Delete button.
5. Choose the transaction(s) you wish to delete.
6. Select the Delete Selected button.
7. Click Yes to confirm.

If you're unable to delete all transactions, switch to Register mode to delete the statement. 

To switch to Register mode, here's how:

1. Go to Edit, then choose Preferences and select Checking from the left panel.
2. Go to the Company Preferences tab.
3. Select Register Mode and select OK, to save your changes.

You can also read this article for your reference: Remove Duplicate Transactions.

Please let me know how it goes or if you have follow-up question or concerns just leave a comment below.