I'm claiming my son's disability credit &entered his line 260 amount into my return. The system continues to prompt for Income = $0?, tho I say NO. Why? Can't netfile:(

The question asks “I confirm that the net income for [Dependant] is zero”. If he has no income ($0.00), then you would answer “YES” to this question. If you answer “NO”, you are saying his net income is NOT zero, and the software will keep flagging it as an error, since the Dependant’s income is entered as $0.00, when it should be a non-zero number.