I think there is a Bug in t1??? For 2019.
There are 2 fields on status - 1. overall status - whether Resident / Non-resident; and 2. the other status is at a provincial level - what province did you live in - as of Dec.31, or the date you emigrated. So really three. I know. I am already confused too.
Those who left the country (from Ontario) and did not have significant residential ties with Canada put status as Non-resident, and the province from where the taxpayer emigrated as Ontario. With this -> TC does not calculate the ON Health premium - which is incorrect. See below CRA url.
Am I missing something or doing something wrong?