From the applicant's personal section in the HQ "My personal site", all the applications initiated by the applicant appear.

In the right-hand column, there are the actions. One of them is "Desist" or "Resign" (depending on whether the procedure has been completed or not), i.e. depending on the stage of the file.

In the example of the following image, the action "Desist" is enabled because the procedure initiated by the applicant has not yet been completed: