The amount of long term care insurance premiums should be listed on line 11 of Wisconsin Form 1. However, you must first enter the insurance premiums on your federal Schedule A so that they will carry over to your state return. You must do so even if you are claiming the standard deduction on your federal return.
Please view page 17, in the link below to see the instructions for Wisconsin Form1.
https://www.revenue.wi.gov/TaxForms2017through2019/2018-Form1-Inst.pdf
