How can I share a form with another user?

how do I allow someone else to access my forms or share my forms with them so they can also access the forms and reports?

This is possible by creating a sub-user account with whom you want to share your forms with. 

You can also assign them access levels to either view submissions and edit forms.

Below is a guide on sharing your form with a sub-account.

https://www.jotform.com/help/232-How-to-Share-Forms-with-a-Sub-Account-User

Kindly do let us know if you need further assistance on this.