Do I have to take IELTS to immigrate to Canada?

If you mean applying for skilled immigrants in Canada, the main applicant (I think it's your parents) must take the G IELTS, and then add a corresponding score to the total score according to the score. If you immigrate with your parents, you don't need to take IELTS.

If you are talking about applying to a Canadian university after emigration, you still have to prepare for the IELTS test, and you must take Class A this time. Although you are a Canadian immigrant, your high school is not taught in English, so the university will still require you to submit your English scores, which can be TOEFL or IELTS. In that case, you'd better prepare for the IELTS test from the second year of high school, prepare to take it several times, and apply with the best results.

I don't know if my answer is your question, hehe.