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I have asked to Seneca indian representative by email. He replied as below.
Thanks for your interest in Seneca.

The portal will open in the first week of December for Sep 2019 intake.
That's some good news. Do you know anything about Humber?
 
Which intake?
September 2019.
I applied on 1st of November when the portal opened for September 2019. Later, they closed it after a day or two. I’m regularly checking my application status on Student Centre. As of now, it’s “application has been received”.