Hello sfpATsasktelDOTnet, and welcome to the QuickBooks Community!
With QuickBooks Desktop you have the ability to send invoices individually, or as a batch. However, In order to email out multiple invoices successfully, you would first need to set the invoices to email later. If 'email later' was not selected, you'll need to access the invoices again and check the box, as there is no current way to mass select them.
Here's how to send multiple invoices at once.
1. Navigate to the File menu, then select Send forms
2. Click the checkbox for each invoice that you want to send Note; You can choose the Combine forms to a single recipient in one email option, if you want to send multiple forms to one customer.
3. Select Send Now.
Here's a helpful guide, if you would like to learn more about Email sales forms in QuickBooks Desktop.
If you have any other questions feel free to reach back out. We would be glad to help!
