If you become a non-resident then no you do not

If you become a non-resident then no you do not have to file taxes.  Becoming a non-resident is a matter of selling all property and closing all personal accounts.  You can leave your RRSP's in Canada but no other ties to the country can remain.  Once you become a non-resident then you do not need to file yearly taxes.  If you are not a non-resident then you will need to file your taxes every year.