You are right, Jesus is buried in Kashmir, so he has not come in physical and material terms. Jesus has returned with spiritual features and characteristics in the form of Mirza Ghulam Ahmad to rectify the errors and blunders done by the Christianity people.
Regards
What blunders ?
Genesis 49:10 has Messiah born of the tribe of Judah - Matthew 1:2-16; Luke 3:23-33; Hebrews 7:14
Psalms 132:11; Isaiah 9:7; Isaiah 11:1; Isaiah 11:10 Messiah from the family of David son of Jesse - Matthew 1:6-16; Matthew 9:27; Acts of the Apostles 13:22-23; Romans 1:3;
Micah 5:2 born in Bethlehem - Luke 2:4-11; John 7:42
and many more corresponding parallel cross-reference verses or passages through to Jesus' death.
Isaiah 53:9 buried with the rich - Matthew 27:57-60; John 19:38-42
John 1:17; John 2:10 in the grave parts of three days, then resurrected by God - Matthew 12:39-40; Matthew 16:21; Matthew 17:23; Matthew 27:64; Matthew 28:1-7
Acts of the Apostles 10:40; Acts of the Apostles 13:30; 1 Corinthians 15:3-8.
Psalms 16:8-11 resurrected before corruption - Acts of the Apostles 2:25-31; Acts of the Apostles 13:34-37
and Psalms 2:7 God declares Jesus as His Son - Matthew 3:16-17; Mark 1:9-11; Luke 3:21-22; Acts of the apostles 13:33; Romans 1:4; Hebrews 1:5; Hebrews 5:5