Certificate of service

You have to fill new Certificate of service.
Bacause it's like you are applying for November, 2020 exam itself. So, you have to follow all things like November, 2020 exam only.

Difference is only that you get set off of old fees paid for May exam, which got cancelled.

Who has to sign,? principal or self attestation is allowed..

There is a difference format of certificate of service, which depends upon articleship status.

1. if your articleship complated, than Principal attestation not required, self attestation is enough.
2. if your articleship is not completed yet/you are pursuing your articleship than Principal attestation required along with your sign.

Ok thank-you.