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Is it when you submit the form online or when you submit the biometrics?

Here: http://www.cic.gc.ca/english/helpcentre/answer.asp?qnum=1474&top=3 it says "
If you apply online or in-person, it starts when you submit your application.". However, I am worried that is outdated and it actually starts when they receive your biometrics.


Yes it actually starts when they receive your biometrics. An indicator is, when you notice the Biometrics reflects on your application.
 
I can update this thread with the info that it definitely only starts processing after you submit your biometrics