How to add a TXT record to a domain
1.Log into the CPanel (Control Panel) of your web hosting account.
2.Go to the Custom DNS Records section.
3.Select the domain or subdomain for your record.
4.Set the TXT record type from the 'Type' drop-down list.
5.Fill the desired TXT record value in the value field and specify the desired TTL setting.
6.Click the ‘Add New’ button to successfully create your custom TXT record.