8老师，几天前得您指点，马上着手填I-824表。研究了好久依然问题一堆，请您再帮我看看吧！谢谢了！
Part 1. Information About You - 这部分是填我的个人信息还是原公司的信息呢？如果填公司信息，那Country of Birth, Citizenship, Date of Birth, US Social Security Number 就leave blank 是吗？
Part 2, Reason for Request - 看来看去应该选D (USCIS to send my approved immigrant visa petition to the National Visa Center (NVC). Instruction上说，If you are reuqesting category D or E in Part 2, the application must be completed and signed by the petitioner of the underlying immigrant visa petition. 所以说这个I-824表应该由我在美国的原雇主递交没错吧？
Part 3, Additional Information - 3. Give the follwing information about the principal beneficiary of the original petition or application. 这是填我申请I-140时的地址吗？
然后我有点糊涂，整张表3个部分，没一个地方给我填我现在的居住地址（加拿大地址），将来他们怎么联系我，还有怎么知道要把材料转到哪儿的领事馆去呢？
问题有点多，麻烦您了！