Merging accounts/forms?

Hello,

One of my colleagues also has a Jotform account?  Am Ii able to share forms from my account with his account? 

You can use Sub users feature to share your account with another user. But this feature is only available to enterprise users.

Alternatively, if you need to allow other users to edit your form, you could create a collaboration link. Here is the guide: Understanding-Form-Collaboration

If you would like to share form's submissions, please refer to this guide: How-to-Share-Form-s-Submissions-Page

Let us know if you need any further assistance.