1. First, start at the Switch home screen and select your profile from the top left of the menu. 

2.  Once on your profile, select User Settings and scroll to the bottom of the page.

3. Once at the bottom, select 'Number for Customer Support'.

Now that you have your Nintendo Support Number, you can enter it when joining to the tournament (remember to input the number with the dashes, as shown on the Switch). 

Good luck!

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