Boxes 52 and 53 are supposed to equal box 21. Box 21 is the important one as that is the total capital gains. Maybe do not enter anything from your T3 slip and file. Let CRA make the eventual re-assessment. My aim was to file electronically and avoid mailing in a paper return. To this end I used my own fix. Other posted fixes work according to other people that posted. At this problematic juncture, using a fix (posted by others and myself) is better than submitting a paper return. I would not be waiting for a fix from Turbotax Canada or CRA. Good luck.
