Penna state instructions clearly say that negative amounts (for a category of income) should not be entered when calculating withholding tax due.

I have a corporation that has a large cap gain loss, but the other categories of income in PA for non residents - ordinary business and royalties - are positive and tax is due on them, but ProSeries when populating the Schedule NW shows 0 income and 0 tax due.

Is there anyway to correct this besides overriding the entries for each shareholder?