In some cases, some fields should be empty despite the program marking them as missing important information. What you can do is highlight the field and hit the F3 key on your keyboard, or right-click the field and select Estimate from the menu.
This will "estimate" the line and remove it as a field missing the required information.
The F3 command will also Estimate/Un-Estimate lines in the Online software.
This information applies to all years of the UltimateTax software.