If you have a negative number for box 42 on your T3 slip you need to enter the number with brackets. for example where it says the "amount resulting from cost base accounting: (1,500)." TurboTax will automatically turn this into a negative amount. 

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Hello Caroline_22

Thank you for the reply but no joy.

My Turbo Tax program will not let me input either a negative number or a number in brackets

And I tried every type of bracket

Any other ideas?