Thank you for replying. Appreciate it! Two additional questions:
1. I will go ahead and fill out the representative form. For the the relationship evidence. They just want birth certificates. But I dont understand how they can find the relationship there, because by the time my niece/my parents granddaughter was born, my sister, i.e., her mother was already married to her husband who has a different last name. I assume, they should have asked for the marriage certificate that lists my parents, my nieces grandparents as the biological parents of my sister/my niece's mother.
2. We dont recall who put as the primary applicant, and perhaps we did not include a dependent before. We believe it was my mother/my niece's grandmother. and did not include her grandfather at that time. I believe we can now add him as well, as a spouse and give a letter for reasoning. Is there any template that anyone here has come across here that we can use as a template?
Thanks again!