Canada doesn't use zip codes. It uses international postal codes.
When you enter the W-2, choose the option to enter a foreign
address, so the data field will change to "Postal Code?"
See the screen shot below which shows how to enter a W-2
that has a foreign employer address.
**Say "Thanks" by clicking the thumb icon in a post. **Mark the post that answers your question by clicking on "Mark as Best Answer"