.TK represents the official domain extension or the internet country code top level domain (ccTLD) of Tokelau. This ccTLD was introduced in 1997 and was intended for entities associated with Tokelau. Dot TK is the authorized agency that carries out (dot)TK registry.
There is no special process needed to register a .TK domain name, no special action is needed on your end.
Entities connected with Tokelau