How to reunite with parents in Canada? Are there any tax requirements?

Yes, according to Canadian law, if you apply for parents' reunion, then the applicant's income in Canada must meet the guarantee requirements of the Canadian Immigration Bureau in order to be guaranteed. The applicant must submit the on-the-job income certificate issued by the Canadian employer and the tax payment certificate issued by the Canadian Taxation Bureau for the applicant. If the on-the-job income certificate and tax payment do not meet the requirements of the Canadian government, you have no right to apply for reunion immigration for your parents.