While calculating itemized deductions, my $11K+ mortgage interest changed my due amount by only a few dollars. What am I missing?

[Ashby · Accepted solution]

It's quite possible that your mortgage interest brings you into itemized deductions, but not by very much. 

The standard deduction nearly doubled this year. It's $12,000 filing single and $24,000 married filing jointly.

So, if your mortgage interest and other deductions only bring you slightly above the standard deduction, you would not see a huge change in tax.