How can I set my business email address and the one I want to receive confirmations email with?

To set emails for :

• Your business (as the sender of the emails to the customers)
• For receiving a copy of your customer's confirmation emails follows

• Sender email:

Your store business email should be provided in the sender's email. This email should be unique. 

When you enter an email in the sender box you need to verify for Amazon that the email that is going to be added is valid. 

After clicking on the verification link you will be redirected to this page:

• • CC: You can input the email or emails that you want to receive a copy of confirmation emails sent to your customers. emails can be separated with commas. 
    
    Note: you can't use the email you have in the sender box
  • BCC: You can input the email or emails that you want to receive a blind carbon copy of confirmation emails. emails can be separated with commas.