I understand the current workaround is to manually split each T3 into 2 according to the split percentages. However, I have many T3s. It is a PITA to manually calculate each one of them and split them like this.
I have discovered Box 52, 53 and 21 accept negative numbers. So my own workaround is to ONLY create 2 extra T3 slips, one for myself and one for my spouse. I label them in the "Notes" as "Turbotax bug" just in case CRA challenge me about their existence. My extra T3 slip only have 3 negative numbers in Box 52, 53 and 21. Box 21 is the TOTAL amount of capital gain across all my T3s I need to split into my spouse's return. My spouse extra T3 slip has the 3 same numbers but are positive.
Other than that I also enter the split percentages of each T3 as usual. This way I don't need to create many T3 slips to workaround this bug. I compared the results of this workaround with StudioTax. The results are correct.
