I'm not sure about test-c, since I use test-e and prop but according to this he should start pct, 18 days after last injection of cypionate.
Anadrol/Anapolan: 24 hours after last administration
Deca: 21 days after last injection
Dianabol: 24 hours after last administration
Equipoise: 21 days after last injection
Fina: 3 days after last injection
Primobolan depot: 14 days after last injection
Sustanon: 18 days after last injection
Testosterone Cypionate: 18 days after last injection
Testosterone Enanthate: 14 days after last injection
Testosterone Propionate: 3 days after last injection
Testosterone Suspension: 24 hours after last administration
Winstrol: 24 hours after last administration