For more information, read the step-by-step guide here.
How to change the name in Valorant in 2021
1. Go to the Riot logging page from here (you can also search for 'Riot ID' on Google and click on the first search result).
3. Now you will receive a mail on your Gmail account that you have provided to Riot when you have created your account in Valorant.
4. Enter the code that you have received on your Gmail and press enter.
5. Now here you can see Riot ID and tagline option, the Riot ID is your Valorant name change it to a new name that you want. You can also change the tagline if you want.
The "name" denotes your in-game name and the "tagline" is used to search for friends in Valorant.
6. Click 'save changes'.
Your Valorant name has now changed successfully, you can now restart the Valorant game in order to refresh to see your new in-game name.
How Frequently You Can Change Your Name in Valorant
Riot allows changing the Valorant in-game name every 30 days. This means the player can change the Valorant name every month. The name-changing date is shown on the Riot account management page.