How do I share an inbox?

My understanding is that you want to share the form submissions to another user. I would recommend you adding them as a Sub-user to your account. In this way, they can view the submissions or edit the forms. Here's a guide: https://www.jotform.com/help/232-How-to-Share-Forms-with-a-Sub-account-User.

You may also share the Submissions page to another person by providing them access, please refer to this user guide: https://www.jotform.com/help/199-How-to-Share-Form-s-Submissions-Page.

Hope that helps. If you need further assistance, let us know. Thank you.