If you want to be fully honest like I did, you should write the number of days you're staying in Canada in the declaration card. No need to say anything else. The officer did notice the number of days in the card and asked me to apply for a PRTD to re-enter Canada.
I first passed by the immigration counter (right before you go down to collect your luggage at YYZ.) The officer only seemed to care about the declaration card at that point when she knew I was a new immigrant. She then directed me to the immigration office after marking my declaration card (I declared an extra bit of cash.) All the immigration officer required was the Passport, COPR and an address to send my PR card. She made me sign both copies of the COPR, took the one with the photo attached and gave me the other one. I then went to get my SIN number at the same place. The whole process took around 10 min. Finally, I passed by the CBSA office after collecting my luggage and met the same officer I first met at the immigration counter. I gave her my lists of goods and goods to follow and filled in the money declaration form. She gave me receipts of the total value of my goods as well as a receipt for the cash. They did not check any of my luggage.
Thanks a lot. I am little confused here. Do we still need to apply for PRTD to re-enter Canada when you get your PR card posted to your residing address if not in Canada?