Activating a Fortnite V-Bucks key is really simple, just follow these steps:
1.Choose to Sign In on the top right corner of the Fortnite home page.
2.Log into your Epic Games account
3.Hover the mouse cursor over the account name on the top-right corner
4.Choose the V-Bucks Card option
5.Click on the Get Started button
6.Write the key code and choose a platform you intend to use your V-Bucks on
7.Click Confirm to redeem your Fortnite V-Bucks!
That's it - enjoy!
The key is not working
If you have activated the key according to the guide but the code appears not to work, please check what type of error message you receive and depending on it follow the appropriate instructions: