234 – Business investment loss
As a rule, you can deduct a business investment loss on line 234 if you sustained losses in 2024 on investments (shares or debt securities) in a Canadian-controlled private corporation (that is, a corporation whose shares are not listed on a stock exchange).
On line 233.1, enter the total losses you sustained before June 25, 2024 (line 3 of form TP-232.1-V, Business Investment Loss). On line 233.2, enter the total losses you sustained after June 24, 2024 (line 11 of form TP-232.1-V).
For more information, see guide IN-120-V, Capital Gains and Losses.