1) It is a tool to determine if you meet requirements for time spent in Canada (Including time credit for any time spent as a temporary resident that may count towards the residency requirement) 2) I filed my 2018 taxes yesterday, sending the application out tomorrow. Covering the last five years (in your case 2018-2014 inclusive) is a good idea. 3) Not entirely sure about this. Did you complete any schooling in Canada? 4) From Canada.ca, "The biographical page means the page where it has your name, photo,passport/travel document no., issue date and expiration date. Provide photocopies of the biographical pages of your current passport and/or travel document. Also, provide photocopies of any renewal pages of the passport(s)/travel document(s)"