Hi Dimitris,

Thank you for purchasing our plugin,

This tab is not added by our plugin, I think it's added by Dokan. I searched and I found a useful snippet. I think you can remove it by adding this PHP code snippet to your site:

add_filter( 'woocommerce_product_tabs', 'dokan_remove_seller_info_tab' , 50 );
function dokan_remove_seller_info_tab ( $array )  {
 unset ($array['seller'] );
 return $array;
}

To add a PHP snippet:

https://woocommerce-b2b-plugin.com/docs/how-to-add-a-snippet-php-or-js/

Let me know if that works,

Kind regards,

Stefan