https://www.canada.ca/en/revenue-agency/services/forms-publications/forms/rc243-sch-b.html
RC243-SCH-B Schedule B - Non-Resident Contributions to a Tax-Free Savings Account (TFSA) - Canada.ca
If, at any time during the calendar year, an individual who made while a non-resident of Canada some contributions in his TFSA, must complete this schedule.