To create a Safety First form in the Web Portal you will either create a New Form or you can edit the set up of an existing form. When creating a new Safety First Form you will be asked if the Form you are creating is a Safety First Form. 

If you would like to edit an existing form to be a Safety First Form you will go to, Forms > View Forms > Edit on the form you would like to change to a Safety First Form and select the Safety First Check Box.