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Do you mean that you have a Sub-Account of a Primary Account and you now wish to reverse that so that the Sub-Account can become the new Primary Account?
If so then what I would suggest that you refer to this guide https://www.jotform.com/help/232-How-to-Share-Forms-with-a-Sub-Account-User and just remove the current Sub-Account User.
After that you can then log into the Sub-Account that you want to make the Primary Account and in their add the previous Primary Account as the New Sub-Account User.