Per IRS Publication 936 Home Mortgage Interest Deduction, page 1:
Mortgage Insurance Premiums
The itemized deduction for mortgage insurance premiums expired on December 31, 2017.
Caution! At the time this publication went to print, Congress was considering legislation to extend the itemized deduction for mortgage insurance premiums. To find out if this legislation was enacted, and for more details, go to IRS.gov/Extenders.