How can I export or share forms so I can upload them to another account

Rather than you exporting it, we suggest you to clone it (import it) to another account. You may find user's guide in the following link:

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

As my colleague has already mention, you can simply clone it if you need only forms. On the other hand, if you need forms together with submission data, we can transfer them to the stated account. In order to allow us to transfer your forms, you need to comment this thread with the account where your form is being.