Aloha.

I modified the MWE as best I understand.  I seem to be missing some 
major part of the documentation.  For example, I don't know how to find 
the 'doclist' and the valid values for variables.  I seem to only find 
them from other peoples' problems.

Here is the modified MWE and it still produces no *.ics entries other 
than boilerplate.

-*- org-icalendar-include-todo: ("TODO" "DONE" "CANCELLED"); -*-
-*- org-icalendar-use-deadline: (todo-due); -*-
MY PROJECT -*- mode: org -*-
#-*- mode: org -*-
#+STARTUP: showall

* Welcome to Org mode

   Welcome, and thanks for trying out Org mode. Making outlines in
   Org is very simple. It is just text! Just start typing.
* This is a headline, it starts with one or more stars
   A heading has one star, a sub-heading two, etc.
* Working with lists
** Moving around in our outline
** TODO Moving around headline
** TODO This is a event with a Deadline
DEADLINE: <2024-06-20 Thu -30d>


On 6/9/24 01:52, Ihor Radchenko wrote:
> John Helly<hellyj@ucsd.edu>  writes:
>
>> So, even this MWE, the export to *.ics does not work as expected. The
>> test.ics file has no events when
>>
>> M-x org-icalendar-export-to-ics
>>
>> is invoked.
>> =========================  Contents of test.org listed below
>> =================
>> -*- org-icalendar-use-deadline: (todo-due);  -*-
>> ...
>> ** TODO This is an event with a Deadline
>> DEADLINE: <2024-06-20 Thu -30d>
> Todo headings are not exported to icalendar by default.
> See `org-icalendar-include-todo'.
>

-- 
John Helly / San Diego Supercomputer Center / Scripps Institution of Oceanography
https://www.sdsc.edu/~hellyj  / 808 205 9882 / 760 8408660