Express Entry starts outside Canada, and needs no employer
You do not need a Canadian address, a Canadian employer, or any Canadian immigration status to create an Express Entry profile. Language tests, the educational credential assessment, and the profile itself can all be completed from your home country. Most applicants entering the pool from abroad apply through the Federal Skilled Worker Program, which first requires clearing a 67-out-of-100 eligibility grid. After an Invitation to Apply, you have 60 days to submit the full application.
Source: Our Express Entry guide
Credentials: check regulation first, then the national body
The national map covers six professions through six national bodies, and the first step is finding out whether your occupation is regulated where you will work. An educational credential assessment, a qualification assessment, and a licence are three separate processes, and paying for one does not buy the others. The recognition process increasingly begins before arrival, so start the checks while you are still abroad.
Source: Our national credentials guide
Citizenship needs 1,095 days, counted back from your signing date
You need at least 1,095 days physically present in Canada within the five years immediately before the date you sign your application, and you must meet the requirement the day before you sign. Each day in Canada as a permanent resident counts as one day. Each day in Canada as an authorized temporary resident or protected person before permanent residence counts as half a day, up to a maximum of 365 days of credit. With the maximum pre-residence credit, you still need at least 730 days after becoming a permanent resident.
Source: Our residency-days guide
TN status is for citizens, not permanent residents
TN status under the Canada-United States-Mexico Agreement is open to citizens of Canada or Mexico only. A permanent resident of Canada who is not a Canadian citizen does not qualify, no matter how long they have lived in Canada. Stays are granted for up to three years at a time, with extensions in increments of up to three years. The mirror test applies in the other direction: the Canadian CUSMA work permit requires United States citizenship, not United States residence.
Source: Our TN status guide