I need instructions to forward my user account to zoho. I see the following, but no instructions:

In case you wish to use you legacy server as the primary email server, the MX entries need not be changed. You can configure dual delivery in your legacy server, to route a copy of incoming emails to Zoho or configure your email server in such a way that the emails for a set of email addresses get routed to Zoho Mail Server.  

How do I do the above on godaddy?  

I do not want to change MX records until I have everything worked out on one user account.