The supporting documents include:
- Valid H-1B visa
- Form I-797/1797B, Notice of Action
- Proof that you live in the United States, such as Form I-94, Arrival/Departure record
- Evidence of your accommodation in the US
- Recent utility bill
- Income Tax report
- Job offer from a Canadian employer
- A letter from the current employer stating that you are not in breach of your H-1B visa term