Reporting a percentage of t5 income on a T3 return

Does anyone know how to report a certain percentage of t5 income on a T3 return? For example, if they died in April of 2020, I would only want to report the months after the date of date. I am able to do this for the T5 income in a T1 return, but cannot seem to figure out how to do this in a T3 return. Thanks!