Mortgage Insurance is a deduction that can now be claimed with the recent tax law change.
Before you amend first check two things;
1) did you itemize in 2017, as if not this will have no tax impact
2) look at how much box 5 is, and decide if you want to. For example, if box 5 is $100 and you are in the 25% tax bracket your refund could increase by $25.
You must report all income, however, do not have to take all deductions.
It is a fairly easy process to Amend and TurboTax walks you through the process.
https://ttlc.intuit.com/replies/3288565
