Thanks for joining the Community, MCAR77
It isn't possible to migrate data between two QuickBooks company files (either Self-Employed or Online).
Depending on the version of QuickBooks that you're using, your accountant may be able to transfer the permissions and billing to you to manage directly. This means that you would continue to access and use the same subscription, without the need to move data.
So that we can check this for you, please contact our support team on 0808 234 5337 or begin a chat.