You mean this verse?
Matthew 9:1-8
9 Jesus got into a boat, crossed the sea, and came to his own city. 2 Some people brought him a paralyzed man on a stretcher.
When Jesus saw their faith, he said to the man, “Cheer up, friend! Your sins are forgiven.”
3 Then some of the experts in Moses’ Teachings thought, “He’s dishonoring God.”
4 Jesus knew what they were thinking. He asked them, “Why are you thinking evil things? 5 Is it easier to say, ‘Your sins are forgiven,’ or to say, ‘Get up and walk’? 6 I want you to know that the Son of Man has authority on earth to forgive sins.” Then he said to the paralyzed man, “Get up, pick up your stretcher, and go home.”
7 So the man got up and went home. 8 When the crowd saw this, they were filled with awe and praised God for giving such authority to humans.
See how you christians spinned this to say jesus forgives? The actual explanation is:
Jesus forgave the man who tried to scam the public. He did wrong to other humans, so those human can forgive him. After that he tells him to go home and the unsaid was, not to scam again.
He did not say that he forgives all humanity from that day on till judgeman day.
Try harder. Where did jesus say he forgives YOU specifically?