This article explains how to return a game on Steam and get a refund. Instructions apply to the Steam website and desktop app.
How to Refund Games on Steam (2022)
You can request a refund for any game you've purchased, but your request will only be approved if the purchase meets Steam's strict requirements for refunds. Here's how to submit a refund request on Steam:
If you are not already logged into your account, visit the Steam website in a web browser and select “Log In.”
Once you've logged into your account, select Support at the top of the page.