From your PS4:

  1. Go to [Settings] > [PlayStation Network/Account Management] > [Account Information] > [Security] > [2-Step Verification] > [Status].

  2. From the drop-down menu select [Inactive] > [Confirm].

  3. 2SV is now switched off on your account.

From a web browser (Sony Account Management site):

  1. Go to the [Account] tab and select [Security].
  2. Click on the link that will open a separate page for two-step verification.

  3. In the 2-Step Verification section select [Edit] next to [Status] > [Deactivate].

  4. 2SV is now switched off on all your devices.