I had the same problem. Put total in box 21 in Box 52 and put 0 in box 53. Error gone plus no change in final tax refunded or owing. Issue CRA may flag T3 as technically incorrect and hold up return or force to be amended. Any body filed with this hack fix and no change later from CRA. Plus why hasn't turbo tax fixed what is a very simple programming issue, at best commented on fix date.
