Where does Gnome-To-Do stores it's file by default ?

Does anyone knows where Gnome To-DO 3.28 store it's file ?

I have some ghost entries I can't remove

JF enter image description here


gnome-todo using Evolution-Data-Server as its storage back-end.

Its data are stored here:

~/.local/share/evolution/tasks

For example tasks list are in below file:

~/.local/share/evolution/tasks/system/tasks.ics

And its cache are stored here:

~/.cache/evolution/tasks

For more details about Evolution-Data-Server you can see this link.