My return shows its in progress, however I have not got any email for acknowledgement from CRA, what is the approximate time for the same and for it to be processed?

When you NETFILE your income tax return, it can be processed in as little as 8 business days but the Canada Revenue Agency requests that you wait at least 4 weeks before contacting them as it can sometimes take longer.

I am filing my first return in Canada, Yet i can NETFILE right? and I am talking about the acknowledgement of receipt of the return and not the processed one.  I have got no communication form CRA.