How to export/import forms from other JotForm account to other?

You can log in from other profile and create new forms there, using URL form import. You can import your previous forms using the same approach

1) At the first you need:

2) This is next step:

If you need to allow others to create a copy of your form only, then these guides will help you: 

https://www.jotform.com/help/401-Where-to-Find-My-Form-URL

https://www.jotform.com/help/42-How-to-Clone-an-Existing-Form-from-a-URL 

If you need to transfer the forms and data, this guide will help you doing so: https://www.jotform.com/help/342-How-to-transfer-or-share-forms-and-data-with-another-account 

I hope this helps.