Yikes. That means that you have been taking too much depreciation (land can't be depreciated). However, because you have already sold it, I would probably just leave it alone now.
I was originally thing the $90,000 discrepancy could have been from the land sale, but you didn't enter any land so that doesn't account for the $90,000 discrepancy. As you said, if you can't figure it out you may need to call Customer Support so they can actually 'see' your tax return. However, I would probably wait a few weeks until all of the forms are finalized.
