The solution is that your losses cannot be greater than you gains. So on your Loss worksheet you have to change the Losses to be equal to your capital gains and then Line 25300 will be populated.
I think Turbotax needs to be changed to handle this properly. Because now the losses will not be carried forward properly. You have to get your actual losses carried forward from your Assessment letter from Rev Can each year.
I managed to get help through Turbotax Canada on Facebook. The support rep got me to do the EasyForm where they advised the loss could not be more than the gain.
