Speaking lies
Q: I never do very well as I normally do in my exams and due to fear of my father, I had forged some of my results and made them higher to present to my father. When I was doing this action I had the frame of mind that by doing so, this deception is allowed because I am preventing any harm to family ties between myself and my father. I do not know if my thinking has any basis on this 'white lying' notion.
(1) Have I committed haraam and just made everything worse with Allah Ta'ala by justifying and 'halaalizing' the wrong?
(2) If so, is my foolish act of 'justifying' it to myself tantamount to kufr?
(3) In addition to Taubah, if I have committed a wrong, is it necessary to reveal my proper results to my father? This incident happened about two months ago.