Adding to open record on form, from unbound textbox

I have a DB that tracks work for employees, the employee logs in and that information is stored in a temp table/query. Them the employee goes to a form and works based on date range for the assignments.
So the problem that I am running in to is, I am trying to add the person and date of when the assignment is complete. So I tried adding VBA to OnClick for the yes/no for the completed field. I created two text boxes one is a d-lookup for the employee and the other is the text box for the date.
Please let me know if addition information is needed.