Dear student,

The ews certificate is valid for only 1 year from the date of issue. Now, if you have made or obtained a valid ews certificate, then it will be very helpful for uploading in the after results process for many exams or for registration for exams. And it will get expired next year. So, don't worry it will work fine till 2021, but after 2021, you have to renew it or make a new ews certificate.