If your spouse does not have a SIN number, please enter 000-000-000.
Do not forget to identify your spouse as a non-resident and ensure you do not apply for the spousal amount.
Footnote: You may want to call the CRA at 1-866-223-4403 (within Canada) to inquire about getting an ITN (Individual Tax Number) or TTN (Temporary Tax Number) for your non-resident spouse.
