1) better to file
2) check www.crc.gc.ca and download instruction t4131 Canadian Residents Abroad
3) most probably you belong to non-resident category and only need to report 0 income from Canada
4) dealine is about the end of Apr
5) I think no result if not file because if you don't have income, you don't have to file. But again it's better to file to have a nice landing record
2) check www.crc.gc.ca and download instruction t4131 Canadian Residents Abroad
3) most probably you belong to non-resident category and only need to report 0 income from Canada
4) dealine is about the end of Apr
5) I think no result if not file because if you don't have income, you don't have to file. But again it's better to file to have a nice landing record