T2125 - Statement of Business or Professional Activities

To open T2125 go to page 3 of the T1Gen and double click on one of those lines.

Please note that T2125 is used for different purposes. You have to double click on one of the self-employed income lines in your T1Gen:

If you use the form T2125, then you have to select the province of self-emplyment in the wizard:

Watch this video for more details: