How do we upload multiple email addresses for sending out a survey?

My understanding is that you want to have multiple recipients for the email notification. If yes, then please check the guide below:

1. Click "Settings" in the top menu and then go to the "Emails" section. Select the Notification and then click the "Edit" button. 

2. Go to the "Recipients" tab. Here you'll see the Recipient Emails where you can add or remove a recipient.

3. Click the "Save" button when you're done.

Related user guides: 
Setting-Up-Email-Notifications
Send-Notifications-to-Multiple-Recipients

Hope that helps. If you have any questions, let us know. Thank you.