Hey dear, we need to sort and handle the need of the hour practically and with a clear mind. Schedule A form was most likely issued to you guys cuz u guys may have missed out to fill in on a specific time line with regards activities, places lived in the last 10years or from the age of 18 whichever period is most recent.
Personally, I recommend you guys to fill out all the details carefully and accurately from the age of 18. You guys shouldn't miss out to declare information even about a single day.
Include the dates between schooling and personal history needs to be mentioned.
Create a spreadsheet/ on a piece of paper, outline all the dates along with all travel/occupation for that time and then have it rechecked atleast 3 times by you and then ask ur spouse to counter check into all the details critically and precisely.
Cic officers will need to know every small detail concerning the history and background about you guys in order to consider admissability with regards to security and safety.
I understand that there are lot of hopes, dreams, emotions and anticipation about immigrating for u guys. I am sure everything will work well for u guys and we are all here in the right Canadian spirit, round the clock to help you guys out. Cheers!!