Some important E-State applications that you may inquire your registered details including your Turkish ID number, tax number and social security registration. (By using below links, you will be directed to the governmental web pages)
From May 18, 2015, Residence permit applications started to be accepted through E-Residence system launced by Directorate General of Migration Management.
TURKISH TAX NUMBER
Application Site: https://intvd.gib.gov.tr/internetvd/index.jsp?page=IVD_VKNO
You may learn your Turkish tax number by using above link. In order to obtain Turkish Tax Number, you need to visit nearest Tax Office in person with a copy of your passport.
TURKISH NATIONAL IDENTITY NUMBER
You may learn your Turkish National Identity Number by using above link.
TURKISH SOCIAL SECURITY SYSTEM
Application Site: https://esgm.sgk.gov.tr/Esgm/UyrukSec?uyrk=0
You may learn your Turkish Social Security details by using above link.
1.ENTRY TO THE E-SGK SYSTEM
2.CHECK IF YOU ARE REGISTERED TO TURKISH SOCIAL SECURITY SYSTEM
3.SOCIAL SECURITY PREMIUMS OF DEPENDENTLY (4A) AND INDEPENDENTLY (4B) WORKING FOREIGNERS
4.CHECK IF YOU ARE REGISTERED WITH GENERAL HEALTH INSURANCE SYSTEM