If you are not sure if the amount is tax exempt, you can check the Canada/US Tax treaty:
https://www.canada.ca/en/department-finance/programs/tax-policy/tax-treaties/country/united-states-a...
Or you can contact the Canada Revenue Agency (CRA). If you are in Canada or the United States, you can call the CRA at 1-800-959-8281. If you are elsewhere, you can call 613-940-8495. This page has more ways to contact the CRA: Contact the Canada Revenue Agency
