For avast subscription renewal, Visit Avast Settings, which is at the bottom of your interface screen.
Avast Free Antivirus 2020 Subscription Status and Information.
Search Avast Registration Information – Renewal Process.
Select Renew Avast Free License for 1 More Year.
Click Ok
If the above statement doesn't help you to renew your avast free license then you can visit our blog to learn more about how to renew avast free in different ways?