Step 1 : Go to dashboard
Step 2 : Click on general settings
Step 3 : Click on Quote Form
Edit the Quote form by clicking on the edit button as shown in the image

Then you need to click on setting tab as shown in the image :

In the admin email field, fill out the email address where you want to receive the notification and then click on save.
Note : You can put multiple email address in this field, email addresses are separated with COMMA