Confused: Visa Form

[JaskaranDhiman]

Hello,

I am in Canada as a foreign worker. My visa going to expire in December. I want to apply visa . Is IMM5257 correct form?? This form has a field asking me "Details to visit Canada". What should I write in it because I am already here in Canada. Secondly, I am living here alone. So i need to fill this form alone or IMM5645(family information) too.

Thanks.