You can only enter this using Form mode. Click on Forms. When in Forms mode click on the 1040/1040SR Wks which will open the Form 1040 and Form 1040-SR Worksheet.
Scroll down the worksheet to Schedule 3. On Schedule 3 Part II under Line 12 is the Other Credits and Payments Smart Worksheet. On Line E enter the amount for Net section 965 inclusion. The amount entered will flow to Schedule 3 Line 13d.
