How to use coupon codes? Duolingo Test Center 2015 When the test taker is prompted with the payment screen: Step1: Test taker has to click the “Enter coupon” button Step 2: Test taker enters the coupon they received. Step 4: Test taker click on “Use Coupon” and the test starts. Step 3: Additional information is displayed: -Who paid the test - The score will be sent to the test payer - The test taker will not receive the score (this is default, but it can be changed). As soon as the test is certified the score will show on the dashboard: link: https://tc-next-3.duolingo.com/dashboard