@JBB0906 

Hi,
Typically, you can only log into a Tapo app with a TP-Link account, and you cannot change the email address of a TP-Link account.

If you want to manage your Tapo devices with another TP-Link account (the valid email address), please refer to the following steps.
  1. Log in to the Tapo app with the old TP-Link account (invalid email address), and remove the Tapo device from the Tapo app. Or press the reset button for 10 seconds on the Tapo device to perform a factory reset.

  2. Log out of the Tapo app. Then, refer to the instructions below to register a new TP-Link account with a valid email address.
      What is TP-Link ID, and how to create a TP-Link ID?

  3. Log in to the Tapo app with the new TP-Link account.

  4. Reconfigure the Tapo device to bind it to the new TP-Link account, and then manage the device with the new account.

Best Regards