If you are not getting a T4 then you are considered self employed. Self employment is not counted as Canadian experience.I want to apply for PR in express entry and I need Canadian Job Experience. Right now I am paying my tax by myself at the end of the year and I am not getting T4.
https://www.canada.ca/en/immigration-refugees-citizenship/services/immigrate-canada/express-entry/eligibility/canadian-experience-class.html#work-experience