Hi

If you only received pensions, then you don't need to enter a T4E slip. 

Make sure that when you entered your information at the start of your return, you did not choose the T4E slip as one of your income statements.  

If you receive this as a warning, then you can skip it and file. If you want to remove it --> Go to the "Personal Information" option on the left side menu (use easy setup mode if you are using the desktop version), and uncheck the T4E slip.

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