New Doctype creation

Hi,

I tried creating a very basic and simple
Doctype through the Core>>DocType.
But it never appears on the desktop under any module.

and i already set permission on doc

Which step am i missing?

You have to include the doctype in the related module config file. Module config files located here: https://github.com/frappe/erpnext/tree/develop/erpnext/config

Please go through the tutorial before making extensions, will save you a lot of time:

https://frappe.io/docs/