In testing – this works fine. Once you enter in your T3 Box 21 – Capital Gains, which translates to the RL16 Box A.
The calculations are then applied to TP726.6 line 21 and to TP726.7 line 11.
Please ensure you have the latest version of the software by applying all recent updates.
Also, double-check that you entering all amounts on your Tslips and RL correctly to ensure proper calculations.