I am about file my CEC, then i found it require all the address information start 18 years old, I have part of address I forgot during the time I was in Vancouver, and I did not file tax return at that time because i do not know that even i just study without income I still can file tax return so there is no record I can find now. I was wondering how big this issue is? Will I get rejected by provide incomplete living history? Thank you in advance.