I qualify to itemize deduction. Why isn't turbo tax add the mortgage interest amount to my itemized deduction amount?

As my total deductions are greater than $25,000, I qualify to use itemized deduction.  I have put in approximately $4000 as mortgage interest but the software does not add this amount to the itemized deduction total.   Note that the $4000 does correctly show in the "your 2018 deduction & Credit page" in the section Your Home. Help!!