TurboTax 2018 Home & Business has chosen Standard Deduction, but I want to switch to Itemized Deduction. No check box to change the option. How to change deductions?

I am using TurboTax 2018 Home & Business. TurboTax has chosen Standard Deduction, but I want to switch to Itemized Deduction. Following instruction in the Help forum, I get to the screen where Turbotax says "You are getting Standard Deduction", but I do not have a check box to change the option on deductions. How to change deductions?