Where is Jesus (PBUH)? He is in heaven with Allah. We believe that he will come back down to Earth just before the hour.
It is described that he will come down in a place in Syria towards the end of time. All the true people of the book will believe in him before his death.
He will come here and lead for so many years and he will come with his signs. He will kill the anti-Christ. He will among us before he dies.