How can I clone my form?

You can easily clone the form in the My Forms page. 

In My Forms, select the form and then click the "More" button. After that, select "Clone Form" in the drop down options.

Related guides:
How-to-clone-an-existing-form-from-your-account
How-to-clone-an-existing-form-from-a-URL

Hope that helps. Thank you.