@NCperson
Thanks for the comment. Yes, I am somewhat aware of the issues surrounding home mortgages, but I have not spent a lot of time focused on what TurboTax is doing.
First, do you see any other likely candidates on the OP's list of Itemized Deductions that would cause some $10,000 in deductions to disappear - other than mortgage interest?
If not, your first paragraph suggests that this "bug" could account for a sizeable reduction in the deductible interest. What do we need to know about the OP's mortgages(s) so that we could reproduce the issue?
My "tell us about your mortgage" was unfortunately vague, but any clarity as to what we need to know would be helpful. Thanks.
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