I inserted it in "thisdocument" but I still can't have it to work.
Regarding my last question about having the due date automatically add 30 days, I found a thread on this forum with a similar request and it does something very similar to what I need. The solution was provided by I think one of the admins. In the solution provided, the user selects from a drop down menu A, B or C and select date from a calendar and then "review on" is automatically calculated.
I am not sure what would be easier. Please let me know how to fix this.