The software is asking if your income is NIL. In tax terms, "Net Income" (Line 23600) can be zero even if your "Total Income" (Line 15000) is high (e.g., if you had massive deductions).
Look at your detailed tax summary. Is your Line 23600 exactly $0.00? If your income is $0.00 (or negative), you must select YES to the "is it NIL" question, even if you had T4 earnings. The error is for NET INCOME, not for the total income.
Hope this helps!
Thank you for choosing
