Losses on rental real estate are often considered 'passive' losses and therefore are not necessarily directly deducted on your tax return unless you have other passive income. The -0- you see on screen may be representing the fact that the loss is not being deducted in the current year, but instead it is being carried over. It does not have to mean that the negative number was not accepted as input to your return.
Take a look at your return to see if the negative number has been reported on Form 8582 as a passive activity loss.
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