Deductions & credits

Use the Forms mode in the Download/CD version of TurboTax to enter your "above the line" charitable deductions @zoso1,

1.  Click on Forms in the upper right corner (next to Flags and Notifications)
2. Once you are in Forms, select 1040/1040SR Wks (the top choice in the left column)
3. The form will open in the big window on the right
4. Scroll down to lines 12a and 12b and enter $400 in each box
5. Click on Step-by-Step in the upper right where Forms used to be to get back to the interview mode

I'm using a SINGLE taxpayer in the screenshot