How do Canadian self-employed immigrants prove their self-employed occupation? Need tax records?

Generally speaking, each applicant's self-employment experience can be proved by business contract, venue lease certificate, equipment purchase record, business license, registration information, deposit income, works, trophies, game videos and other evidences. Although the tax record is a relatively intuitive proof of self-employment, not everyone has this record, so there is no way to apply? Of course not, because this is not the only evidence. As long as the evidence is sufficient, it will not be worse than this, as long as it can reflect the applicant's professional level and business ability. /zd/ym