desktop has two modes. interview where the app takes you step by step-by-step through the questions and asks for you to answer the questions or enter the number. the other mode is forms mode, but you have to use the proper form. for example, interest income must be entered through a 1099-INT form not directly on schedule B and not directly on form 1040 line 2,
you are apparently using forms mode and you are entering in the incorrect place which shows up as red or pink.
in forms mode you need to know the form name. to get to it type the form number like 1099-int in the search box.
it appears you are not familiar with forms mode you may want to delete that return and srtart over in interview mode. this is the only mode for online which I assume if you used online in the past you are familar with which would make it a better choice.
to get to step-mode click on the view tab and select step-by-step. or use "CTRL and 1 " at the same time
