Nintendo does not allow for returns, unlike what is typical for online video game stores such as Epic, Origin, Steam, etc.

* https://www.epicgames.com/site/en-US/store-refund-policy
* https://store.steampowered.com/steam_refunds
* https://help.ea.com/en/help/account/returns-and-cancellations/

But:

* https://www.nintendo.co.uk/Support/Nintendo-Switch/Refund-for-Downloaded-Game-or-DLC-Wrong-Game-Didn-t-Like-Game-Accidental-Purchase–1379023.html