I need help writing the line of code where by the option to select Completed is only available if the "In Progess Date" has a value.
Hello @AndrewSmith21,
It is possible to remove choices from a choice list using a choice_filter. Please see the Cascading and external selects documentation for more information as well as the Choice Filters and Cascading Selects sample in Survey123 Connect.
I've attached a sample that will only display the "Completed (stop)" choice if there is a value in the inprogressdate question.