Add subaccount and remove subaccounts

Thank you for contacting us. 

Yes it is possible to add are removed Sub Account users. 

Inside of this guide you can find how to add and share forms with a Sub Account User: 

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

If you want to remove user go to your account, select Users tab. Select user which you want to remove click on Edit option and then click on Delete User button. 

Hope this will help. Let us know if you need further assistance.