Filing Taxes in USA and then Canada vs filing them together

theBasher91 wrote: ↑ My employer (USA) is offering to do my US-taxes for me (I live in Canada therefore owe taxes to Canada as well).

Is there any disadvantage to letting this company file my taxes for me, and me dealing with the Canadian portion? Or is it best to go to an accountant and file them together?

agit wrote: ↑ Make no different but must for your benefit do the USA tax first and then CAD. Claim the Provincial and Federal Foreign Tax Credit, also note that you must do "U.S. Nonresident Alien Income Tax Return 1040NR" + state and city return in the USA if your Visa type "TN Visa" or "J1 Visa"