To remove communal income please follow the steps given below: 

• First of all, after signing into your account and return, click on the "Find" (Magnifying Glass) option which can be found on the upper right side of the screen.
• Type "T3", and click on "GO"
• On this page, click on "Edit" and remove the amount beside "Amount of communal income reported in box 26"
• Click on "Done with T3" to save all changes made.

For more information on T3 visit this page of the Canada Revenue Agency: - T3 Statement of Trust Income Allocations and Designations (slip)

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