Add email or another account?

Add email or another account?

I am very new to this technology. I set up a Zoho business email for my site a while back I'm unclear how I was even successful. Now I have another site and it needs a business email. Is there a way to add it to the Zoho account or do I create a new one? Is there a better way to chat with Zoho help for these issues?
I have epkfinds.com and now I need homelivingdefined.com.