I am trying to apply for study permit online. As some places still affected in my country because covid19. my dad couldn't get the certificate of revenues that he gets from a state institution along with tax certificate. Though, he got his bank statement for the last 6 months, salary attestation. My father still have the business revenue certificate and tax certificate he got for 2019, but no able to get the 2020 one. Would that be Ok, if I attach last year certificate, because the business revenue is mentioned as fixed.