There are a few different ways that you can change Netflix accounts on a smart TV. The first way is to go into the settings menu and look for the option to sign out of your account. This will usually be under the Account or Profile section. Once you have signed out, you can then sign in with a different account by entering your email address and password.
Another way to change Netflix accounts on a smart TV is to use the guest mode feature. This feature allows you to create a temporary profile that another person can use to watch Netflix. To do this, simply go into the settings menu and look for the option to enable guest mode. Once guest mode is enabled, you will be able to create a new profile by selecting it from the main menu.
Finally, if your smart TV has a built-in web browser, you can also change Netflix accounts by going directly to the Netflix website and signing in with a different account. To do this, simply open up the web browser on your smart TV and navigate to www.netflix.com. From here, click on the Sign In link at the top of the page and enter your email address and password for the new account that you want to use.