The fact that your wife isn't working or didn't work at all in 2018 is irrelevant. You still file joint (as your have). Now, if turbotax took the standard deduction then it's because your itemized deductions do not exceed your standard deduction (which is at least $24K) and is therefore the bigger deduction for you. So switching to itemized will mean you will pay more in taxes. However, if that's what you want, here's how to change to itemized.
In the search box at the top right enter the words "standard deduction and exemptions"and click the search or find thingy. Give it a moment and click the "jump to" link when it appears. Work that through and you can change as desired.