The IRA contribution is an adjustment, which means it is not reported on the schedule A, Itemized Deductions, it is reported on line 32 on form 1040.
It can lower your Adjusted Gross Income (AGI) which could lower your tax liability.
You can choose the "Standard Deduction" and still deduct the IRA contribution.
To enter the IRA contribution,
Sign into your account
Take me to my return
Pick up where I left off
Type " ira contributions " in the search box on the top right of the screen
Click on "Jump to ira contributions" on the drop-down list
(Please see screen shot below)