i dont know where to file???

[adeldddd]

hello every one, i have question regarding filling for canadian immigration in buffalo.
im oreginaly citizen of bulgaria and i live in the US at the moment. i came to the US on tourist visa then i filled for green card after that. right now my green card AOS case is still pending, and i have been issued EAD .
my question is can i apply for canadian immigration through family member from the US or do i have to go back home and file from there?  thanks to every one