I have a T3 slip with my SIN# but the income is listed in my name and my 2 sisters. how do I split the come in 3 so revenue canada knows this.

I have t3 slip with my sin # on it . But the income is registered in my name and my 2 sisters name. they are listed in the address part of the t3 slip. How do I go about splitting the income in 3  on your program so revenue Canada knows this as well.