In general, you are still a resident alien, so you could file jointly with your wife, but you would have to report income from after leaving the US. However, you could use the foreign paid tax credit or utilize the US Canada tax treaty, depending on the type of income. See https://www.irs.gov/forms-pubs/about-publication-597
If you do not want to report your income after leaving the US, you would need to file as married filing separately, a dual status return and add a statement applying for an early residency termination date (see the other answer for details)
