https://www.lexpera.com.tr/resmi-gazete/21-07-1985/18818 monthly 2026-07-21T06:04:16Z https://www.lexpera.com.tr/resmi-gazete/metin/katma-deger-vergisi-genel-tebligi-18818-seri-no-15 1985-07-21T00:00:00Z