Why imt asking declaration from junta

What I do now

IMT is asking you a proof of your address - "comprovativo de morada"

Which place of jonta council can give declaration please give me some help

You have to go to the parish council where you live. If you don't know where it is, go to a café/shop near where you live and ask where the parish council (junta de freguesia) is located. At the " Junta " explain them what you want.