Fox77 Thanks for getting in touch. If you have already enabled sellers.json on your AdSense account for the specific domain, you do not need to enable it again on Ezoic.
However, it is recommended that you ensure that the information in the sellers.json file is up-to-date and accurate for your domain to provide transparency for advertisers.
You can update this information in the Ezoic Ads tab on your Ezoic dashboard by navigating to Ad Transparency > Sellers.json and entering the name of your business or your website's domain name in the 'Display Name' box and clicking on the 'save' button.
If you have concerns about having your seller information visible, you can choose to "Hide My Seller Info" but it is recommended that you list the 'Display Name' as the name of your website rather than hiding the information to provide the transparency that sellers.json is intended to achieve.