Originally Posted by
ISTFlyer
Yes, no change fee would be collected if you decide to change the origin and destination. Only the difference in mileage and taxes would be collected ( it's both zero for your case ).
This applies to all tickets issued by TK until 31 December 2021 ( including awards ) for travel until 31 March 2021.
There is no specific "award" policy so it's the general policy that would apply.
Sorry to be pedantic, but do you mean tickets issued until 31 Dec 2021 for travel until 31 Mar *2022*?
The official zero change fee page results a big fat not found error -
https://www.turkishairlines.com/en-int/zero-change-fee/