The first thing to take into consideration when looking to update the DNS for your domain is if your domain is using our Nameservers.
Our Nameservers are either "NS1.TIERRA.NET" and "NS2.TIERRA.NET" or "NS1.DOMAINDISCOVER.COM" and "NS2.DOMAINDISCOVER.COM".
If your domain name is not currently set to point to either of those sets of Nameservers, your DNS is not being hosted on our system.
To access the DNS settings for your domain:
Log into your account and click on DNS.
Using the drop down menu under Select domain to manage, select the domain name you're looking to update and click the Go button.