How do I add Salesforce Lead Source to my HubSpot forms? (de-de) Last updated: April 10, 2025 Add Lead Source as a hidden field to your HubSpot forms. This method allows you to predetermine a Lead Source for contacts who fill out your form. Related articles: How do I associate a form with a Salesforce campaign? How do I associate a form with a Salesforce campaign? How to use contact profiles for lead intelligence Forms