where can i add company name

I am not sure I understood your question. Could you please provide more details about your requirements? 

You want to add your company name and details in your form, you can add a text a field to the form, write company details and you can place the field wherever you want in the form. You can also add the logo using the Image field.

Please explain more about the issue if the above solution didn't work for you. We will wait for your response.