The skill tests are a part of the Guided lessons you play and can also be found via Learn → Missions tab.
Once you've completed the last task in the Skill test, please tap on the Continue button. The information is pre-filled for you but you can also change it on the certificate screen. After you tap on the Make my certificate, it will be emailed to you.
I can't find my certificate
If you have just completed a level but can't find the certificate in your inbox, please check your spam/junk folder, as the email could have landed there. If you're trying to find a certificate for one of your previous levels, just search for "Yousician Certificate" in your inbox. The certificate is included in the email and can be accessed at any time.
If you have lost the email, you can re-play the Skill test and re-send it to yourself. Alternatively, you can reach out to Yousician Support, who can email you a copy. Please note that Support can not change the first or last name on the certificate.