To add an SPF record, you will need to navigate to your hPanel's DNS Zone Editor menu located in the Advanced section. After that, look for the TXT (Text) section and select the option to Add SPF record.
You will then see a confirmation message - SPF record created. The newly created SPF record will be shown in the TXT (Text) section.
NOTE: You can find more information on how to set up DNS Zone Editor's records here :)