With the decisions taken by the Authorities, All Passengers arriving in Turkey are requested to fill in the form for Entry to Turkey at https://register.health.gov.tr/ with in the last 72 hours before the Flights as of March 15th 2021.
The form requires your passport details, Address where you will reside in Turkey ranging from the City, District and village. It also requires your most recent travel history 10 days before your travel to Turkey.