@jerseymd2010 , generally speaking, income is sourced to where the work is performed. Thus is you are a resident of Canada, the remote earnings would be sourced and taxed in Canada. Because you are citizen of USA, you would also be taxed by USA on your world income and given credit for taxes paid to Canada--- suggest you consult a tax professional ( given the size of the income you are talking about). You would generally be non-resident in NJ and generally will not have a NJ sourced income. A lot of this depends on how you are earning in the USA --as a self-employed, or through an entity that you own or direct contract with a doctor's office or what. Therefore I again suggest a tax professional help. It would be mistake to do self-help unless you are very familiar with US tax laws, NJ tax laws, Canadian Tax laws and the US-Canada tax treaty. There will always be the question of closer connection .
your rental income would definitely be sourced to NJ and so you have to file a Non-Resident NJ return to cover that
I can only help , if you really insist in doing it by yourself and with details of your arrangement for earnings streams, how long you plan to stay in Canada etc.
