2018 T3 trust return calculating an incorrect Ontario basic additional tax

The 2018 T3 trust return is calculating an incorrect Ontario basic additional tax for minimum tax purposes due to an incorrect percentage in Chart 2 of the T3 Ontario form. It is calculating 11.5% of line 48 of Schedule 12 when it should be 33.67%.

Example of the incorrect calculation:

Workaround

Manually override the calculation at line 1 of Chart 2 with the amount calculated by multiplying the value at Line 48 of the form T3 Schedule 12, if applicable, by 33.67% instead of 11.5%.

Example: