About SOA record:-
SOA is known as start of authority (SOA) record is information stored in a domain name system (DNS).
A DNS zone is the part of a domain for which an individual DNS server is responsible. Each zone contains a single SOA record.
Steps to setup SOA record:-
1.login to your WHM
2. Next step goto DNS functions in the home page.
3.Next step goto Edit DNS Zone and click to open
4.Next there you can view the multiple domain names which you hosted in the server.From the list select the domain name which you want to setup or modify.
5.Than there you see the EDIT option>>Click to open
6.Here you can view all the records>>goto SOA records in that column fill the values you need to set or modify the SOA to have a new one.
8. In the below click the save tab to save the modified settings.
Follow the above steps to setup an new SOA record.
Hope this article will help you.