How to Create Nintendo Network Id on Switch?

How to Create a Nintendo Account

Go to the Nintendo Account website and click Sign in/Create account.
Click Create a Nintendo Account.
Enter your date of birth and click Submit.
Select the signin method you want to use.

How do you Create a Nintendo Account and Link a Nintendo Network ID to a Nintendo Account?

Go to the Nintendo Account website and sign in to your Nintendo Account.
Click User info, then scroll down to the Linked accounts section and click Edit.
Click the box next to Nintendo Network ID.
Follow the onscreen steps to add your NNID and password.

Do you Need a Nintendo Network ID for the Switch?

Nintendo Network ID
Its been revealed that with the Nintendo Switch digital purchases will be tied to user accounts, rather than to individual consoles, and youll be accessing online services offconsole via a mobile app so it seems that your Nintendo Switch wont have any need for a Network ID.

Is Nintendo Network ID same as Nintendo Account?

Your Nintendo Network ID not the same as your Nintendo Account User ID was used for online services with the Wii U and 3DS, where it provided access to the Nintendo eShop and Miiverse. You can link your Nintendo Network ID to your Nintendo account through the Nintendo account settings page.