The Situation:

Facts about Pensions in Canada

OAS
GIS
CPP

The very first step to get the pensions is to file your Income Tax Return when you are 64.
Even if you've never done your Taxes before, it is 100% necessary to automatically get your pension money when you turn 65.
(Actually your 1st money comes at the end of the month after your birthday month!)

Income Tax Filing: Your monthly pension depends completely on your Tax Return information.
If you do not do your Tax Return before April 30 every year, the wheels on your Money Train will grind to a stop in June or July.
This is because the computer will think you are dead, so no more money for you!
Free tax services are at local libraries, community centers, etc. (But only from Mar 1 to Apr 30)
So get it DONE every Spring or your monthly money WILL STOP!